87 results on '"Delclòs X"'
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2. Stingless bees (Hymenoptera: Apidae) in Holocene copal and Defaunation resin from Eastern Africa indicate Recent biodiversity change
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Solórzano-Kraemer, M.M., Kunz, R., Hammel, J.U., Peñalver, E., Delclòs, X., and Engel, M.S.
- Abstract
Although specimens in fossil to Recent resins are remarkable for their fidelity of preservation, amber is well known and studied, unlike the younger resins as Pleistocene copal (2.58–0.0117 Ma) and Holocene copal (0.0117 Ma–1760 AD), or Defaunation resin, which is resin produced after 1760 AD. However, the scientific relevance of these younger resins preserving arthropods that lived in pre-Anthropocene time is often underestimated. Here, we present specimens of workers of stingless bees included in copal and Defaunation resin, from the coastal vichaka forests in Tanzania, and from northwest Madagascar, ranging in age from almost 3000 BP years to only 80 ± 30 BP years and from 2015, respectively. Three known species Hypotrigona gribodoi, Liotrigona bouyssoui, and Liotrigona nilssoni and two new species Axestotrigona kitingae sp. nov. and Hypotrigona kleineri sp. nov. have been discovered from 36 studied specimens. We also noted that the holotype of Trigona richardsi is a junior subjective synonym of Axestotrigona ferruginea ferruginea. The coastal forests in the East Africa region and in East Madagascar are now highly fragmented so that we can expect that the new species are already extinct. Here we demonstrate that the study of inclusions in copal and Defaunation resin can document losses of local biodiversity resulting, for example, from deforestation and they also bring proof of this potential anthropic defaunation.
- Published
- 2022
3. Biting midges (Diptera: Ceratopogonidae) from the Early Cretaceous El Soplao amber (N Spain)
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Pérez-de la Fuente, R., Delclòs, X., Peñalver, E., and Arillo, A.
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- 2011
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4. Terrestrial Isopods from Spanish Amber (Crustacea: Oniscidea): Insights into the Cretaceous Soil Biota
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Generalitat Valenciana, Agencia Estatal de Investigación (España), European Commission, Peñalver Mollá, Enrique [0000-0001-8312-6087], Sánchez-García, Alba, Peñalver Mollá, Enrique, Martínez-Delclòs, X., Engel, Michael S., Generalitat Valenciana, Agencia Estatal de Investigación (España), European Commission, Peñalver Mollá, Enrique [0000-0001-8312-6087], Sánchez-García, Alba, Peñalver Mollá, Enrique, Martínez-Delclòs, X., and Engel, Michael S.
- Abstract
[EN] Terrestrial isopods (Crustacea: Oniscidea) are a model group for studying the colonization of land. However, their fossil record is remarkably scarce and restricted to amber inclusions, and therefore amber deposits represent valuable windows to their past diversity and morphology. Here we present a new collection of 11 terrestrial isopod specimens preserved in Albian-aged amber from the Peñacerrada I outcrop, northern Spain, which collectively represent the most thoroughly documented fauna of Mesozoic Oniscidea. The three new genera and species identified belong to three of five major groups of the Oniscidea: Eoligiiscus tarraconensis, new genus and species (Ligiidae), Autrigoniscus resinicola, new genus and species (Synocheta: Trichoniscidae), and Heraclitus helenae, new genus and species (Crinocheta: Detonidae?). These taxa significantly expand the known fossil record of Oniscidea and demonstrate that considerable cladogenesis had already transpired by the Albian. The assemblage represents the earliest-known diversification of Oniscidea, extending direct evidence of terrestrialization in the group back to the late Early Cretaceous. These new taxa exhibit some characteristics that may inform hypotheses relating to general patterns of terrestrial isopod evolution. A discussion is provided about different aspects of the paleoecology and biology of the fossils compared to the Recent fauna. The new species indicate that Cretaceous isopods were a group of considerable adaptive diversity, exhibiting innovations analogous to what Recent isopods would exhibit 105 million years later.
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- 2021
5. Local amber in a Palaeolithic context in Cantabrian Spain: the case of La Garma A
- Author
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Peñalver, E., Álvarez-Fernández, E., Arias, P., Delclòs, X., and Ontañón, R.
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- 2007
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6. Long‐proboscid brachyceran flies in Cretaceous amber (Diptera: Stratiomyomorpha: Zhangsolvidae)
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Arillo, A, Peñalver, E, Pérez‐De La Fuente, R, Delclòs, X, Criscione, J, Barden, P, Riccio, M, and Grimaldi, D
- Abstract
The monophyletic family Zhangsolvidae comprises stout‐bodied brachyceran flies with a long proboscis and occurring only in the Cretaceous, originally known in shale from the Early Cretaceous Laiyang Formation (Fm.) in China (Zhangsolva Nagatomi and Yang), subsequently from limestones of the Early Cretaceous Crato Fm. of Brazil. Cratomyoides Wilkommen is synonymized with Cratomyia Mazzarolo and Amorim, both from the Crato Fm.; Cratomyiidae is synonymized with Zhangsolvidae. Two genera and three species of Zhangsolvidae are described: Buccinatormyia magnifica Arillo, Peñalver and Pérez‐de la Fuente, gen. et sp.n. and B. soplaensis Arillo, Peñalver and Pérez‐de la Fuente, sp.n., in Albian amber from Las Peñosas Fm. in Spain; and Linguatormyia teletacta Grimaldi, gen. et sp.n., in Upper Albian–Lower Cenomanian amber from Hukawng Valley in Myanmar. Buccinatormyia soplaensis and Linguatormyia teletacta are unique among all Brachycera, extant or extinct, by their remarkably long, flagellate antennae, about 1.6× the body length in the latter species. A phylogenetic analysis of 52 morphological characters for 35 taxa is presented, 11 taxa being Cretaceous species, which supports placement of the family within Stratiomyomorpha, although not to any particular family within the infraorder.
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- 2019
7. A new dustywing (Neuroptera: Coniopterygidae) from the Early Cretaceous amber of Spain
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la Fuente, R, Delclòs, X, Engel, MS, and Peñalver, E
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Cretaci ,Cretaceous Period ,Spain ,Ambre ,Insectes fòssils ,Insects fossil ,Espanya ,Amber - Abstract
A new Cretaceous dustywing, Soplaoconis ortegablancoi gen. et sp. nov. (Neuroptera: Coniopterygidae), is described from four specimens preserved in Early Cretaceous (Albian, ~105Ma) El Soplao amber (Cantabria, northern Spain). Two additional specimens are assigned to this new taxon. A crossvenational abnormality on an area of diagnostic significance from one of the holotype's forewings provides a reminder of the importance of not ruling out character plasticity or teratoses when evaluating palaeodiversity. A comment on the possible palaeoecological significance of the co-occurrence as syninclusions of plant trichomes with the holotype of S. ortegablancoi and seven of the eleven described Burmese amber dustywing species is provided.
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- 2019
8. Amber in Portugal: state of the art
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Peñalver, E, Barrón, E, Delclòs, X, Álvarez-Fernández, E, Arillo, A, López Del Valle, R, Lozano, R, Murillo-Barroso, M, Pérez-De La Fuente, R, Peris, D, Rodrigo, A, Sánchez-García, A, Sarto I Monteys, V, Viejo, JL, and Vilaça, R
- Abstract
Portuguese amber has received very little attention from the paleontological and geological points of view. To our knowledge, only twelve amber outcrops or amber-bearing areas have been detected in Portugal. The first outcrops were cited in times as old as 1867 and 1910, and although some of them were considered Jurassic in age, most likely the amber came from Cretaceous deposits. The Portuguese outcrops are poor in amber and, thus far, only a dipteran (Nematocera) insect has been found as bioinclusion (Cascais amber); the area of Estoril-Cascais, near Lisbon, provides amber interesting from the paleoentomological standpoint. In contrast, prehistoric amber from Portugal, namely as diverse types of beads and pendants, has been researched in some detail during the last decades. The 25 archeological localities known occur from north to south, ranging in ages from the Neolithic through the Chalcolithic to the Late Bronze Age. Further research is required to prospect the known paleontological localities, and also to look for new ones, in order to obtain stratigraphically contextualized samples and to perform the first infrared and/or Raman spectroscopy analyses. This will allow comparing these with the infrared and/or Raman spectra of archeological pieces to shed light on the origin of the amber as a raw material during prehistoric times. The potential discovery of a paleontological locality yielding abundant bioinclusions would be of great interest, as it would allow taxonomic and paleoecological comparisons with the rich Cretaceous outcrops from the north and northeastern Iberian Peninsula
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- 2018
9. Two new fungus gnats (Insecta, Diptera, Mycetophilidae) from the Lower Cretaceous of Spain
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Blagoderov, V. and Martínez-Delclós, X.
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- 2001
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10. New Cretaceous Scoliidae (Vespida=Hymenoptera) from the Lower Cretaceous of Spain and Brazil
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Rasnitsyn, A.P. and Martı́nez-Delclòs, X.
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- 1999
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11. The oldest record of libellulid dragonflies from the Upper Cretaceous of Kazakhstan (Insecta: Odonata, Anisoptera)
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Fleck, G., Nel, A., and Martı́nez-DelclòS, X.
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- 1999
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12. Geografía de la crisis inmobiliaria en Cataluña: una lectura a partir de los desahucios por ejecución hipotecaria
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GRATET. Anàlisi Territorial i Estudis Turístics, Geografia, Universitat Rovira i Virgili, Gutiérrez, A.; Delclòs, X., GRATET. Anàlisi Territorial i Estudis Turístics, Geografia, Universitat Rovira i Virgili, and Gutiérrez, A.; Delclòs, X.
- Abstract
Filiació URV: SI, El estallido de la burbuja inmobiliaria y la crisis financiera global han permitido destapar de forma más evidente las consecuencias del modelo inmobiliario español, basado en la concepción de la vivienda como un instrumento de creación y apropiación de rentas, y apoyado en una progresiva financiarización de la vivienda. Así, la proliferación de vivienda vacía o inacabada, mientras se desbocan los desahucios, representa la principal manifestación de una situación paradójica. El trabajo desarrolla un análisis en clave territorial de la crisis inmobiliaria en Cataluña. Para ello, una de las variables clave es el estudio de los desahucios por ejecución hipotecaria. Ante la falta de datos oficiales sobre el volumen y distribución de este fenómeno a una escala inferior a la provincial o a la del partido judicial, el trabajo propone el uso de las viviendas de segunda mano propiedad de la banca como fuente secundaria alternativa. Ello permite desarrollar una aproximación a este fenómeno a escala inframunicipal a través de tres casos de estudio (Tarragona, Terrassa y Salt). Además de confirmar la utilidad de esta fuente, los resultados del trabajo permiten demostrar empíricamente como los desahucios por ejecución hipotecaria han tendido a concentrarse en aquellos barrios más desfavorecidos, contribuyendo, así, a profundizar la desigualdad en las ciudades., The bursting of the real estate bubble and the onset of global financial crisis have allowed to unmask the consequences of the Spanish real estate model, which has been based on the conception of housing as an instrument for the creation and appropriation of urban rents, supported by a progressive financiarization of the built environment. Thus, the proliferation of vacant or unfinished housing together with a f
- Published
- 2017
13. Geografía de la crisis inmobiliaria en Cataluña: Una lectura a partir de los desahucios por ejecución hipotecaria
- Author
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Universitat Rovira i Virgili, Gutiérrez, A.; Delclòs, X., Universitat Rovira i Virgili, and Gutiérrez, A.; Delclòs, X.
- Abstract
El estallido de la burbuja inmobiliaria y la crisis financiera global han permitido destapar de forma más evidente las consecuencias del modelo inmobiliario español, basado en la concepción de la vivienda como un instrumento de creación y apropiación de rentas, y apoyado en una progresiva financiarización de la vivienda. Así, la proliferación de vivienda vacía o inacabada, mientras se desbocan los desahucios, representa la principal manifestación de una situación paradójica. El trabajo desarrolla un análisis en clave territorial de la crisis inmobiliaria en Cataluña. Para ello, una de las variables clave es el estudio de los desahucios por ejecución hipotecaria. Ante la falta de datos oficiales sobre el volumen y distribución de este fenómeno a una escala inferior a la provincial o a la del partido judicial, el trabajo propone el uso de las viviendas de segunda mano propiedad de la banca como fuente secundaria alternativa. Ello permite desarrollar una aproximación a este fenómeno a escala inframunicipal a través de tres casos de estudio (Tarragona, Terrassa y Salt). Además de confirmar la utilidad de esta fuente, los resultados del trabajo permiten demostrar empíricamente como los desahucios por ejecución hipotecaria han tendido a concentrarse en aquellos barrios más desfavorecidos, contribuyendo, así, a profundizar la desigualdad en las ciudades.
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- 2017
14. Geography of the housing crisis in Catalonia: an overview from the point of view evictions due to foreclosures
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Geografia, Universitat Rovira i Virgili, Gutiérrez A; Delclòs X, Geografia, Universitat Rovira i Virgili, and Gutiérrez A; Delclòs X
- Abstract
© Aaron Gutiérrez, Xavier Delclòs, 2017 and Scripta Nova, 2017. The bursting of the real estate bubble and the onset of global financial crisis have allowed to unmask the consequences of the Spanish real estate model, which has been based on the conception of housing as an instrument for the creation and appropriation of urban rents, supported by a progressive financiarization of the built environment. Thus, the proliferation of vacant or unfinished housing together with a fast growth in evictions rates represents the main manifestation of a paradoxical situation. This paper develops a territorial analysis of the real estate crisis in Catalonia. For this purpose, one of the key variables is the study of evictions due to foreclosures. Given the lack of official data regarding the volume and distribution of this phenomenon on a scale lower than the provincial or the judicial party, this study proposes the use of second-hand dwellings owned by banks as an alternative secondary source. This allows for an approximation to this phenomenon at an infra-municipal level, through three case studies (Tarragona, Terrassa and Salt). Beyond confirming the usefulness of this source, results allow to demonstrate empirically how evictions due to foreclosures have tended to concentrate in the most disadvantaged neighborhoods, thus contributing to the deepening of inequality in cities.
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- 2017
15. ¿Hipertrofia inmobiliaria? : Análisis de las pautas territoriales del boom e implicaciones del estallido de la burbuja en Cataluña
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Gutiérrez, A., Delclòs, X., GRATET. Anàlisi Territorial i Estudis Turístics, Geografia, and Universitat Rovira i Virgili
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lcsh:GE1-350 ,Catalonia ,Geografía ,Geography ,urbanismo expansivo ,Expansive urbanism ,lcsh:G1-922 ,Real estate boom ,Housing overproduction ,Catalogne ,Crisis econòmiques -- Catalunya -- 2008 ,0210-5462 ,Urbanisme expansif ,Boom inmobiliario ,Urbanismo expansivo ,Sobreproducción de vivienda ,sobreproducción de vivienda ,Boom de l'immobilier ,Cataluña ,Surproduction de logement ,lcsh:Environmental sciences ,lcsh:Geography (General) ,Geografia - Abstract
El trabajo desarrolla un análisis de las implicaciones territoriales de la producción de vivienda en Cataluña durante los años del boom inmobiliario. Se analiza la desigual distribución espacial de los impactos derivados del elevado volumen de producción combinados con la actual crisis inmobiliaria, así como las lógicas espaciales que subyacen en estos procesos. La proliferación de viviendas inacabadas y vacías presenta una distribución territorial que permite identificar territorios afectados por la sobreproducción y/o con una mayor concentración de expectativas de negocio inmobiliario frustrado. El estudio de los impactos territoriales de la crisis inmobiliaria actual no puede analizarse de forma separada a la huella generada por la hipertrofia inmobiliaria precedente. Por ello, las pautas territoriales de efectos derivados de ésta (viviendas vacías e inacabadas) se situarán en relación a las lógicas espaciales de la producción de vivienda durante el boom, a sus vínculos con un modelo de urbanizador expansivo y, en definitiva, a una geografía de la producción de vivienda en Cataluña. This paper develops an analysis of the uneven spatial impact of housing production in Catalonia during the real estate boom. It highlights the uneven spatial distribution of the impacts resulting from the housing production in combination with the current economic crisis, as well as the spatial logic underlying these processes. The proliferation of unfinished and vacant dwellings shows a spatial distribution that identifies the most affected areas of overproduction and/or with a higher concentration of frustrated real estate expectations. The study of the spatial impact of the current housing crisis cannot be analyzed separately from the footprint generated by the precedent property hypertrophy. Thus the territorial pattern of effects of the boom (vacant and unfinished houses) will be placed in relation to the spatial logic of production during the housing boom. Hence, its links with an expansive development model and, ultimately, a geography of housing production in Catalonia. L'article développe une analyse des inégalités spatiales de la production de logements en Catalogne pendant les années du boom de l'immobilier, en soulignant l'inégale répartition spatiale des impacts résultant de la surproduction et la crise actuelle, ainsi que les logiques spatiales derrière ces processus. La prolifération de logements vides et inachevés montre une répartition spatiale qui permet d'identifier les zones les plus touchées par la surproduction et / ou avec une concentration plus élevée d'attentes d'affaires immobiliers frustrées. L'étude de l'impact spatial de la crise actuelle du logement ne peut être analysée séparément de l'empreinte générée par l'hypertrophie immobilière précédente. Ainsi, le schéma territorial des effets du boom (logements vides et inachevées) seront mises en rapport avec la logique spatiale de la production de logements pendant le boom et ses liens avec un modèle de promoteur expansif et, en fin de compte, avec une géographie de la production de logements en Catalogne.
- Published
- 2015
16. ¿Hipertrofia inmobiliaria? Análisis de las pautas territoriales del boom e implicaciones del estallido de la burbuja en Cataluña
- Author
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GRATET. Anàlisi Territorial i Estudis Turístics, Geografia, Universitat Rovira i Virgili, Gutiérrez, A.; Delclòs, X., GRATET. Anàlisi Territorial i Estudis Turístics, Geografia, Universitat Rovira i Virgili, and Gutiérrez, A.; Delclòs, X.
- Abstract
http://revistaseug.ugr.es/index.php/cuadgeo/article/view/2527 Filiació URV: SI, El trabajo desarrolla un análisis de las implicaciones territoriales de la producción de vivienda en Cataluña durante los años del boom inmobiliario. Se analiza la desigual distribución espacial de los impactos derivados del elevado volumen de producción combinados con la actual crisis inmobiliaria, así como las lógicas espaciales que subyacen en estos procesos. La proliferación de viviendas inacabadas y vacías presenta una distribución territorial que permite identificar territorios afectados por la sobreproducción y/o con una mayor concentración de expectativas de negocio inmobiliario frustrado. El estudio de los impactos territoriales de la crisis inmobiliaria actual no puede analizarse de forma separada a la huella generada por la hipertrofia inmobiliaria precedente. Por ello, las pautas territoriales de efectos derivados de ésta (viviendas vacías e inacabadas) se situarán en relación a las lógicas espaciales de la producción de vivienda durante el boom, a sus vínculos con un modelo de urbanizador expansivo y, en definitiva, a una geografía de la producción de vivienda en Cataluña., This paper develops an analysis of the uneven spatial impact of housing production in Catalonia during the real estate boom. It highlights the uneven spatial distribution of the impacts resulting from the housing production in combination with the current economic crisis, as well as the spatial logic underlying these processes. The proliferation of unfinished and vacant dwellings shows a spatial distribution that identifies the most affected areas of overproduction and/or with a higher concentration of frustrated real estate expectations. The study of the spatial impact of the current housing crisis cannot be ana
- Published
- 2015
17. Eosyntexis Rasnitsyn 1990
- Author
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Ortega-Blanco, J., Rasnitsyn, A. P., and Delclòs, X.
- Subjects
Insecta ,Arthropoda ,Animalia ,Biodiversity ,Hymenoptera ,Anaxyelidae ,Taxonomy ,Eosyntexis - Abstract
Genus Eosyntexis Rasnitsyn, 1990 Type species: Eosyntexis senilis Rasnitsyn, 1990. Included species: E. senilis Rasnitsyn, 1990 from the Lower Cretaceous of Transbaikalia, E. tuffinae Rasnitsyn & Jarzembowski in Rasnitsyn et al., 1998 from the Lower Cretaceous (Berriasian in age) of England, E. catalonica Rasnitsyn & Martínez-Delclòs, 2000 and E. parva sp. n. from the Lower Cretaceous (Barremian and Albian in age, respectively) of Spain. New diagnosis of the genus. Forewing (Fig. 1 C-F, 2D) with pterostigma sclerotized; crossvein 1r-rs lost; cell 1mcu pentagonal or, if hexagonal, with one side very short; crossvein 2r-rs arising from the mid-part of pterostigma (not from near apex); M+Cu vein straight or slightly arched only very basally; section 3Cu shorter than 4Cu. Flagellomeres of the antenna less than twice as long as wide (Figs. 4A, C). Pronotum with distinct fore and upper faces meeting at angle (Fig. 3E). Propleura not elongated to form a distinct neck (Figs. 2B, 3A). Remarks. Within Syntexinae, Syntexis is the most distinct because of its flat pronotum, transparent (unsclerotized) pterostigma, R lost beyond pterostigma, 1r-rs retained, section 3Cu and cell 2a very long (longer than half of 1a). These characters are difficult to evaluate without a cladistic analysis, although they suggest that Eosyntexis is more closely related to Cretosyntexis than to Syntexis (except for the form of pronotum which is not known in sufficient detail for Cretosyntexis). Nevertheless, Eosyntexis is more like Syntexis than Cretosyntexis in some wing characters, such as having 2r-rs placed at pterostigmal mid-length (correlating with this, RS before it very long and arched near 1mcu), M+Cu straight and 1mcu pentagonal or almost so. Eosyntexis differs from the other genera in having flagellomeres comparatively short. The main similarity between Eosyntexis and Cretosyntexis lies in loss of 1r-rs and pronotum differentiated into fore and upper faces meeting at angle. Similarities between Syntexis and Eosyntexis are the straight M+Cu, the pentagonal 1mcu and the proximal position of 2r-rs. Finally, Syntexis and Cretosyntexis resemble each other in having long, narrow antennomeres. The exact relationships between the different genera are impossible to decide without a cladistic analysis., Published as part of Ortega-Blanco, J., Rasnitsyn, A. P. & Delclòs, X., 2008, First record of anaxyelid woodwasps (Hymenoptera: Anaxyelidae) in Lower Cretaceous Spanish amber, pp. 39-50 in Zootaxa 1937 on page 42, {"references":["Rasnitsyn, A. P., Jarzembowski, E. A. & Ross, A. J. (1998) Wasps (Insecta: Vespida = Hymenoptera) from the Purbeck and Wealden (Lower Cretaceous) of southern England and their biostratigraphical and paleoenvironmental significance. Cretaceous Research, 23, 77 - 86.","Rasnitsyn, A. P. & Martinez-Delclos, X. (2000) Wasps (Insecta: Vespida = Hymenoptera) from the Early Cretaceous of Spain. Acta Geologica Hispanica, 35, 65 - 95."]}
- Published
- 2008
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18. Syntexinae Benson 1935
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Ortega-Blanco, J., Rasnitsyn, A. P., and Delclòs, X.
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Insecta ,Arthropoda ,Animalia ,Biodiversity ,Hymenoptera ,Anaxyelidae ,Taxonomy - Abstract
Subfamily Syntexinae Benson, 1935 Remarks: The family Anxyelidae is included in the Siricoidea [= Anaxyelidae + “ Gigasiricidae ” + Siricidae (sensu Grimaldi & Engel 2005); = Anaxyelidae + Protosiricidae + Daohugoidae + Siricidae + Xiphydriidae (sensu Rasnitsyn & Zhang 2004a, b, Rasnitsyn 2006)] and comprises four subfamilies: the Late Jurassic Anaxyelinae Martynov, 1925, the Late Jurassic or Lower Cretaceous Kempendajinae Rasnitsyn, 1980, the Lower Cretaceous Dolichostigmatinae, Rasnitsyn 1968 and the Lower Cretaceous – Recent Syntexinae Benson, 1935. The palaeogeographical range of the family is extensive, specimens being known from Central Asia, England, Spain and Brazil. The Syntexinae includes three genera: the extant Syntexis Rohwer, 1915 and two Lower Cretaceous genera, Eosyntexis Rasnitsyn, 1990 (Neocomian of East Siberia, Berriasian of England and Barremian of Spain) and Cretosyntexis Rasnitsyn & Martínez-Delclòs, 2000 (Barremian of Spain) (see Fig. 5). New diagnosis of Syntexinae. Pedicel as long as scape (known only for Syntexis and Eosyntexis parva n. sp.) (Figs. 2G and 4B). Pronotum with dorsal face well developed and crossed by medial suture or impressed line (Fig. 2C). Mesonotum with distinct transverse rugae (known for Syntexis and Cretosyntexis, although in E. parva similar rugae are present on the pronotum) (Figs. 2A, C and 3E). Fore wing with SC completely lost, 1r-rs either longer than 2r-rs or lost. Hind wing with r-m placed near RS bending and with m-cu lost (known only for Syntexis and Eosyntexis senilis). Remarks. The Syntexinae show an important simplification and reduction of the wing venation (Fig. 1): fore wing with SC completely lost, RS more or less straightened between cells 1mcu and 2r due to 1r-rs crossvein either long or lost, distal R and RS sometimes lost; hind wing when known with distal venation somewhat reduced, with r-m crossvein displaced basally and m-cu lost. Also the long pedicel, furrowed pronotum and mesonotum with marked sculpture distinguish Syntexinae from the three other subfamilies., Published as part of Ortega-Blanco, J., Rasnitsyn, A. P. & Delclòs, X., 2008, First record of anaxyelid woodwasps (Hymenoptera: Anaxyelidae) in Lower Cretaceous Spanish amber, pp. 39-50 in Zootaxa 1937 on pages 41-42, {"references":["Benson, R. B., (1935) On the genera of the Cephidae, and the erection of a new family Syntexidae (Hymenoptera: Symphyta). Annals and Magazine of Natural History (ser. 10) 16, 534 - 553.","Grimaldi, D. & Engel, M. S. (2005) Evolution of the Insects. Cambridge University Press, 775 pp.","Rasnitsyn A. P. & Zhang H. (2004 a) Composition and age of the Daohugou hymenopteran (Insecta, Hymenoptera = Vespida) assemblage from Inner Mongolia, China. Palaeontology, 47, 1507 - 1517.","Rasnitsyn A. P. (2006) Letopis' i cladogramma [Fossil record and cladogram]. In: Rozhnov S. V. (ed.). Evolutsiya biosphery i bioraznoobraziya [Evolution of biosphere and biodiversity]. Moscow, KMK Press, 39 - 48.","Rasnitsyn, A. P. (1980) Origin and evolution of the Hymenoptera. Transactions of the paleontological Institute, Academy of Sciences of URSS, 174, 1 - 192 (in Russian).","Rohwer, S. A. (1915) A remarkable new genus of Cephidae. Proceedings of the Entomological Society of Washington, 17, 114 - 117.","Rasnitsyn, A. P. & Martinez-Delclos, X. (2000) Wasps (Insecta: Vespida = Hymenoptera) from the Early Cretaceous of Spain. Acta Geologica Hispanica, 35, 65 - 95."]}
- Published
- 2008
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19. Foreword
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MARTÍNEZ-DELCLÒS, X. and NEL, A.
- Published
- 2008
20. Factores principales de control de la sedimentación y los cambios bióticos durante el tránsito Jurásico-Cretácico en la Cadena Ibérica
- Author
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Salas, Ramón, Martín-Closas, Carles, Delclòs, X., Guimerà, J., Caja, Miguel Ángel, and Mas, Ramón
- Subjects
Iberian Chain ,Climate ,Late Jurassic ,Early Cretaceous ,Extensional tectonics - Abstract
The Iberian Chain developed by inversion of Mesozoic rifts of the Iberian Basin during the Paleogene. The Maestrat and Cameros basins developed during the Late Jurassic-Early Cretaceous rifting cycle 2. There are two main controls on sedimentation: (1) tectonics, (2) climate, and these together control sea-level and paleoecosystems. Cameros and Maestrat basins display different styles of extensional tectonic structure probably due to a crust thermally weakened. Biotic changes in freshwater plants, continental faunas, and marine carbonate producers, reveal the evolution from Late Jurassic-Earliest Cretaceous climate to show hydrological seasonality in a general warm and humid context. This is confirmed by the coexistence of biotic markers of hydrological stress (closed stomatal structures in plants, small size in animals) with sedimentologic indicators of a long-lasting humid climate (lateritic soils and karstic bauxite deposits). The long-term global sea-level curve fits the main transgressive-regressive evolution of the Maestrat basin with some local tectonic disturbances
- Published
- 2005
21. Phylogenetic analysis of the Cenozoic family Sieblosiidae (Insecta: Odonata), with description of new taxa from Russia, Italy and France
- Author
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Nel, A., Petrulevicius, J.F., Gentilini, G., Martínez-Delclòs, X., Paléobiodiversité et paléoenvironnements, Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology - Published
- 2005
22. Main factors controlling sedimentation and biotic change during the Late Jurassic-Early Cretaceous in the Iberian Chain
- Author
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Salas, Ramón, Martín-Closas, Carles, Delclòs, X., Guimerà, J., Caja, Miguel Ángel, and Mas, Ramón
- Subjects
Iberian Chain ,Climate ,Late Jurassic ,Early Cretaceous ,Extensional tectonics - Abstract
The Iberian Chain developed by inversion of Mesozoic rifts of the Iberian Basin during the Paleogene. The Maestrat and Cameros basins developed during the Late Jurassic-Early Cretaceous rifting cycle 2. There are two main controls on sedimentation: (1) tectonics, (2) climate, and these together control sea-level and paleoecosystems. Cameros and Maestrat basins display different styles of extensional tectonic structure probably due to a crust thermally weakened. Biotic changes in freshwater plants, continental faunas, and marine carbonate producers, reveal the evolution from Late Jurassic-Earliest Cretaceous climate to show hydrological seasonality in a general warm and humid context. This is confirmed by the coexistence of biotic markers of hydrological stress (closed stomatal structures in plants, small size in animals) with sedimentologic indicators of a long-lasting humid climate (lateritic soils and karstic bauxite deposits). The long-term global sea-level curve fits the main transgressive-regressive evolution of the Maestrat basin with some local tectonic disturbances
- Published
- 2005
23. A revision of the Mesozoic dragonfly family Tarsophlebiidae, with a discussion on the phylogenetic positions of the Tarsophlebiidae and Sieblosiidae (Odonatoptera: Panodonata)
- Author
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Fleck, G., Bechly, G., Martinez-Delclòs, X., Jarzembowski, E.A., Nel, A., Paléobiodiversité et paléoenvironnements, Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology - Published
- 2004
24. Insects from Lower Miocene of Ribesalbes (Castellón, Spain). Plant-insect interaction
- Author
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Peñalver, Enrique and Delclòs, X.
- Abstract
This paper carries out the study of ichnofossils originated by insects found in the Lower Miocene locality of 'La Rinconada', near Ribesalbes (Province of Castellón, Spain). The main fossil record is integrated by plant-insect interactions that are observed in leaves and leaflets: ovipositions, mines and a chew mark. The insect ovipositions, on leaves of Laurophyllum, Caesalpiniaceae and Populus, show ovate to oblong eggs with 0.9-1.1 mm length and 0.2-0.3 mm width. They occur in eccentric arcs, sometimes with a zigzagged pattern. These ovipositions were produced by damselflies of the family Coenagrionidae. Insect mines are reported in leaves of Laurophyllum and Celtis?, and show a blotch shape in Laurophyllum sp., with a channel-structure, and a linear shape in Celtis sp.? Insect larvae, which were endophytophagous, i.e. internal plant parasites, produced these channel marks of leaf-mines. The mine patterns observed in Laurophyllum leaf are similar to those produced by the recent larvae of the Nepticulidae (Lepidoptera). Such a diverse set of plant-insect interactions are uncommon in the fossil record. In addition, one level with bioturbation, possibly produced by aquatic larval chironomids, is also described here. Key words: Insecta, Odonata, Coenagrionidae, ovipositions, Lepidoptera, Nepticulidae, leaf-mines, leaf chew marks, Miocene, Spain., En el presente trabajo se realiza el estudio de icnofósiles originados por insectos que se han encontrado en el yacimiento de 'La Rinconada', del Mioceno Inferior, en Ribesalbes (Castellón). El registro fósil más importante está constituido por interacciones planta-insecto observadas en hojas y folíolos: puestas, minas y una marca de mordedura en el margen foliar. Las puestas, en hojas de Laurophyllum, Caesalpiniaceae y Populus, muestran huevos con una forma aovada-oblonga con una longitud de 0,9-1,1 mm y una anchura de 0,2-0,3 mm. Su disposición muestra un patrón linear y curvo, ocasionalmente las líneas se disponen en zigzag. Estas ovoposiciones fueron producidas por odonatos de la familia Coenagrionidae. Las minas han sido observadas en hojas de Laurophyllum y Celtis?, y tienen forma de mancha en Laurophyllum sp., con estructura de galería, y una forma linear en Celtis sp.? Estas marcas de minas en las hojas fueron producidas por larvas endofitófagas que por ello eran también parásitos internos de las plantas. Los patrones de las minas en la hoja de Laurophyllum son similares a los producidos actualmente por larvas de la familia Nepticulidae (Lepidoptera). Las diferentes interacciones entre plantas e insectos aquí descritas son poco comunes en el registro fósil. Asimismo, se describe un nivel con bioturbación debida a larvas acuáticas de insectos, posiblemente quironómidos. Palabras clave: Insecta, Odonata, Coenagrionidae, puestas, Lepidoptera, Nepticulidae, hojas minadas, marcas de mordedura, Mioceno, España.
- Published
- 2004
25. Tafonomía y paleoecología del ecosistema acuático de Las Hoyas (Barremiense superior, Serranía de Cuenca)
- Author
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Delclòs, X., Martín Closas, C., Buscalioni, A.D., Fregenal Martínez, María Antonia, La Fuente, M. de, Gómez Gómez, Beatriz, Poyato Ariza, Francisco J., and Soriano Catalán, C
- Subjects
Geología estratigráfica ,Paleontología - Abstract
The freshwater ecosystem of Las Hoyas contains one of the most significant records of aquatic organisms described from the Early Cretaceous worldwide. The benthos was formed by a diverse assemblage of animals such as aquatic insects, ostracods, cray-fishes, and juvenile and small adult fishes, which depended on the ground cover of charophytes and aquatic angiosperms for shelter and food. The nekton was mainly composed o f crustaceans and a large variety of fishes. Phytoplankton is represented by two chlorophytes and zooplankton is represented by planktonic pupae of dipterans. Cheirolepidiaceous conifers, matoniaceous tree-ferns and herbaceous schizaeacean ferns were growing in swamps. Among tetrapods with aquatic habitats modern amphibians and reptiles were found. In spite of the exceptional preservation, the fossil record of Las Hoyas includes sedimentological, taphonomic and palaeoecological biases. Form the palaeoecological point o f view, mass mortality levels contain thousands of individuals of crayfish associated with freshwater plant remains. These levels are attributed to eutrophication events of the otherwise oligotrophic lake. Other mass-mortality levels include hundreds of juvenile teleostean individuals associated with small shrimps. Changes in the water-table and related temperature changes, variation of acidity or input of toxic substances may account for this type of mass mortality.
- Published
- 2004
26. The earliest occurrence and remarkable stasis of the family Bostrichidae (Coleoptera: Polyphaga) in Cretaceous Charentes amber
- Author
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Peris, D, primary, Delclòs, X, additional, Soriano, C, additional, and Perrichot, V, additional
- Published
- 2014
- Full Text
- View/download PDF
27. New beetles (Insecta: Coleoptera) from the Lower Cretaceous of Spain
- Author
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PONOMARENKO, A. and MARTÍNEZ-DELCLÒS, X.
- Abstract
Three beetles remains from the Lower Cretaceous lithographic limestones of Spain are described. We classified them into two new genus and three new species. One specimen named Tetraphalerus brevicapitis n.sp. was placed in the Cupedidae, and both Megacoptoclava longiurogomphia n.gen., n.sp. and Bolbonectus lithographicus n.gen., n.sp. in Coptoclavidae.
- Published
- 2000
28. Wasps (Insecta: Vespida = Hymenoptera) from the Early Cretaceous of Spain
- Author
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RASNITSYN, A.P. and MARTÍNEZ-DELCLÒS, X.
- Abstract
Wasps and their relatives from the Lower Cretaceous lithographic limestones of Spain have been studied. Thirty specimens representing 30 species (4 of them with undetermined placement), at least 21 genera and 11 families are recorded. We erect 1 new family - Andrenelidae-, 6 new genera and 11 new species: Meiaghilarella cretacica n.gen., n.sp. (Sepulcidae Ghilarellinae), Eosyntexis catalonicus n.sp., Cretosyntexis montsecensis n.gen., n.sp. (Anaxyelidae Syntexinae), Montsecephialtites zherikhini n.gen., n.sp. (Ephialtitidae Ephialtitinae), Karataus hispanicus n.sp. (Ephialtitidae Symphytopterinae), Manlaya ansorge i n.sp. (Gasteruptiidae Baissinae), Andrenelia pennata n.gen., n.sp. (Andrenelidae n. fam.), Cretoserphus gomezi n.gen., n.sp. (Mesoserphidae), Montsecosphex jarzembow skii n.gen., n.sp., Angarosphex penyalveri n.sp., Pompilopterus (?) noguerensis n.sp. (Sphecidae Angarosphecinae), Cretoscolia conquensis n.sp. (Scoliidae Archaeoscoliinae). The Mesozoic family Ephialtitidae is revisited based on the restudy of the type-species. We compare these Spanish Cretaceous assemblages with other ones from various parts of the world: Central and Eastern Asia, England, Australia, and Brazil. The number of genera and families identified in the Spanish fossil-sites is almost the same as in the English Purbeck and Wealden. The absence of some hymenopteran groups as Xyelidae, is consistent with the warm climate know to exist in Spain during the Early Cretaceous. We conclude that both La Cabrúa and La Pedrera assemblages - the two sites that have yielded the greatest number of species- correspond to the Lower Cretaceous “Baissin type” (sensu Rasnitsyn et al., 1998), but including some Jurassic “survivors”. La Pedrera assemblage fits equally well in the “angarosphecine subtype”, while La Cabrúa roughly corresponds to the “proctotrupid” one, although shows a comparative ly high proportion of angarosphecins. This fact may suggest: a) possibly asynchrony between these two fossilsites, b) environmental differences not reflected in the lithological record, c) different taphonomic processes and/or, d) insufficient sample size - to reflect the reality of the source populations-. La Pedrera assemblage is very similar to those from Weald Clay (England), Bon Tsagan (Mongolia) and Santana (Brazil). La Cabrúa approaches to a some extent, though not quite agrees with the Purbeck (UK), Koonwarra (Australia), and most Lower Cretaceous Asian assemblages.
- Published
- 2000
29. Insects from Lower Miocene of Ribesalbes (Castellón, Spain). Hymenoptera
- Author
-
Peñalver, Enrique and Martínez-Delclòs, X.
- Abstract
This paper studies a significant part of the fossil hymenopterous of the Lower Miocene locality of 'La Rinconada', near Ribesalbes (Province of Castellón, Spain), housed in several collections. Formicidae studied by other authors in the early eighties are reviewed. New additions to the study of hymenopterans are new specimens assigned to the following taxa: Tiphiidae indet., Ammophila aff. sabulosa (Sphecidae), Bombus sp. (Apidae), Helconinae (Braconidae), cf. Eucerotinae (Ichneumonidae) and Pteromalidae indet., together with several undetermined forms of Braconidae and Ichneumonidae. Except for Formicidae, all these taxa are uncommon in the fossil record. At Ribesalbes, they are represented by single specimens, except for the two specimens of the genus Bombus. Taphonomic observations are included and two useful methods for the study of compressed fossil insects affected by tectonic deformation are proposed. Key words: Insecta, Hymenoptera, Lacustrine environment, Lower Miocene, Spain., En el presente trabajo se realiza el estudio de una parte importante de los himenópteros fósiles del yacimiento del Mioceno Inferior de 'La Rinconada', en Ribesalbes (Castellón), presentes en varias colecciones. Se realiza una revisión de los Formicidae estudiados por otros autores a principios de los 80. Se añaden al estudio de los himenópteros nuevos ejemplares que han sido incluidos en los siguientes taxones: Tiphiidae indet., Ammophila aff. sabulosa (Sphecidae), Bombus sp. (Apidae), Helconinae (Braconidae), cf. Eucerotinae (Ichneumonidae) y Pteromalidae indet., así como varias formas indeterminadas de las familias Braconidae e Ichneumonidae. Todos estos taxa, a excepción de los Formicidae, son poco comunes en el registro fósil. En Ribesalbes estos taxa están representados por un único ejemplar, a excepción de los dos especímenes del género Bombus. Se incluyen observaciones de tipo tafonómico y se proponen dos métodos útiles para el estudio de insectos fósiles en compresión que han experimentado deformaciones tectónicas, como es el caso de los insectos de Ribesalbes. Palabras clave: Insecta, Hymenoptera, Medio lacustre, Mioceno Inferior, España.
- Published
- 2000
30. Cretaceous mycelia preserving fungal polysaccharides: taphonomic and paleoecological potential of microorganisms preserved in fossil resins.
- Author
-
SPERANZA, M., ASCASO, C., DELCLÒS, X., and PEÑALVER, E.
- Subjects
MYCELIUM ,FUNGAL morphology ,PALEOECOLOGY ,TAPHONOMY ,POLYSACCHARIDES ,CRETACEOUS Period ,FOSSIL resins - Abstract
The cortices of pieces of Cretaceous amber around the world commonly are constituted by networks of filamentous structures. Based on their morphological characteristics, such structures have previously been classified in different microorganismal groups. Their correct interpretation, however, is of great importance to establish the conditions of the resin's burial in the forest litter, and can provide important clues regarding the ecology and environmental conditions of Cretaceous resinous forests. Because these networks of filamentous structures present typical fungal morphological features we conducted a study in order to resolve their origin. The cortices of several pieces of Cretaceous amber from Spain were examined using light and scanning electron microscopy, energy dispersive X-ray spectroscopy and confocal laser scanning microscopy. This is the first time that Calcofluor white and Wheat germ agglutinin conjugated with fluorescein isothiocyanate have been employed as fungal markers in amber, and their use enabled us to detect preserved polysaccharides in the filamentous structures using confocal laser scanning microscopy. These results provide the first and oldest record of β-1,3 and β-1,4-linked polysaccharides, and specifically N-acetylglucosamine residues from chitin in a fossil fungus preserved in amber and to demonstrate that the networks of filamentous structures are mycelia composed of profuse hyphae of a resinicolous fungus. This type of mycelium constitutes one of the largest fungal fossil records known. Using taphonomic data it is demonstrated that the cortices originated during the Cretaceous due to fungal growth within non-solidified resin. The fossil diagenetic degradation sequence of the fungal hyphae and the surrounding amber is described. This degradation changed the microscopic appearance of the hyphae; thus, some of the previously indicated taxonomic features of this microorganism may actually be fossil diagenetic artifacts. The paleoecological implications with regard to fungal trophic requirements and forest environmental conditions are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
31. Insects from Lower Miocene of Ribesalbes (Castellón, Spain). Paleoptera and Neoptera poli- and paraneoptera
- Author
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Peñalver, Enrique, Nel, André, and Martínez-Delclòs, X.
- Abstract
The Ribesalbes Lower Miocene fossil insects site (Castellón, Spain) is located in the Ribesalbes-Alcora basin (Iberian Range). This basin is a complex graben limited by normal faults. The fossil insects appear in oil shales which were formed from the sediments of a meromictic stratified lake. Bioturbation has not been observed but tectonic deformations are frequent. Both the extraordinary fossil preservation and the strong lamination of the sediments, suggest the action of algal or microbial mats. Apart from insects, other fossil remains have been found: Anura and Urodela amphibians, bird feathers, Gastropoda, Ostracoda and a high number of leaves, flowers and seeds. The study of the numerous specimens housed in Museo Paleontológico Municipal de Valencia, Museo del Colegio 'La Salle' de Paterna (Valencia), Museo Nacional de Ciencias Naturales (Madrid) as well as in private collections, has resulted in the identification of a high number of taxa not cited before in Ribesalbes (8 orders and 23 families). In this paper, the following orders are studied: Odonata, Grylloptera, Orthoptera, Isoptera, Psocoptera, Homoptera, Heteroptera and Thysanoptera. Two new fossil species of dragonfly and damselflies are described, Oligaeschna saurai n. sp. (Aeshnidae) and Sympecma? ribesalbesensis n. sp. (Lestidae). The species Platycnemis? cincuneguii Gil, 1926, is redescribed. Isoptera, Orthoptera and Psocoptera fossil records from Ribesalbes provide new evidences which support the existence of a warm climate in this geographical area during the Lower Miocene. Key words: Insecta, Paleoptera, Neoptera, Lacustrine environment, Lower Miocene, Spain., El yacimiento con insectos fósiles de Ribesalbes (Castellón, España) pertenece a la cuenca de Ribesalbes-Alcora (Cordillera Ibérica), datada como Mioceno inferior. Esta cuenca corresponde a un graben complejo limitado por fallas normales. Los insectos fósiles se encuentran en ritmitas bituminosas formadas a partir de los sedimentos de un lago estratificado (meromíctico). Las ritmitas bituminosas no presentan bioturbación y están muy deformadas por tectónica. La conservación extraordinaria de los restos fósiles y una roca muy laminada sugieren la acción de tapices algales o velos microbianos. Además de insectos, han sido hallados anfibios anuros y urodelos, plumas de ave, Gastropoda, Ostracoda y un alto número de hojas, flores y semillas. El estudio de numerosos especímenes, conservados en el Museo Paleontológico Municipal de Valencia, Museo del Colegio 'La Salle' de Paterna (Valencia), Museo Nacional de Ciencias Naturales (Madrid) y en colecciones privadas, ha supuesto la identificación de un alto número de taxa no citados hasta ahora para este yacimiento (8 órdenes y 23 familias). En este trabajo se estudian 8 órdenes: Odonata, Grylloptera, Orthoptera, Isoptera, Psocoptera, Homoptera, Heteroptera y Thysanoptera. Se describen las nuevas especies fósiles de odonatos Oligaeschna saurai n. sp. (Aeshnidae) y Sympecma? ribesalbesensis n. sp. (Lestidae). Se redescribe la especie Platycnemis? cincuneguii Gil, 1926, cuya localidad tipo es Ribesalbes. El registro existente de los órdenes Isoptera, Orthoptera y Psocoptera proporciona nuevas evidencias sobre la existencia de un clima cálido en este área geográfica durante el Mioceno inferior. Palabras clave: Insecta, Paleoptera, Neoptera, Medio lacustre, Mioceno inferior, España.
- Published
- 1996
32. Taphonomy
- Author
-
Fregenal-Martínez, M. A., Buscalioni, Angela D., Diéguez, Carmen, Evans, S., Mcgowan, G., Martínez-Delclòs, X., Meléndez, Nieves, Ortega, Francisco, Pérez-Moreno, Bernardino P., Poyato-Ariza, Francisco J., Rabadà, D., Sanz, José Luis, and Wenz, Sylvie
- Abstract
Trabajo presentado en el II International Symposium on Lithographic Limestones celebrado en Cuenca.-- Field trip guide book. The taphonomic anal ysis of the Las Hoyas site is still at an early stage. This analysis is necessary since it is considered a prerequisite for paleoecological reconstructions (Shipman, 1981). Besides, taphonomic analysis has its own aims; in this case they could be summarized as the establishment of the temporal succession of processes which led to the formation of the site.
- Published
- 1995
33. First record of anaxyelid woodwasps (Hymenoptera: Anaxyelidae) in Lower Cretaceous Spanish amber
- Author
-
ORTEGA-BLANCO, J., primary, RASNITSYN, A. P., additional, and DELCLÒS, X., additional
- Published
- 2008
- Full Text
- View/download PDF
34. Insectos del Cretácico inferior de Santa Maria de Meià (Lleida): colección Lluis Marià Vidal i Carreras
- Author
-
Martínez-Delclòs, X.
- Published
- 1990
35. The Mesozoic non-calopterygoid Zygoptera: description of new genera and species from the Lower Cretaceous of England and Brazil and their phylogenetic significance (Odonata, Zygoptera, Coenagrionoidea, Hemiphlebioidea, Lestoidea)
- Author
-
Jarzembowski, E.A., primary, Martı́nez-Delclòs, X., additional, Bechly, G., additional, Nel, A., additional, Coram, R., additional, and Escuillié, F., additional
- Published
- 1998
- Full Text
- View/download PDF
36. A Review of the Eurasian fossil species of the bee<E1>Apis</E1>.
- Author
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Nel, A., Martınez-Delclòs, X., Arillo, A., and Peñalver, E.
- Subjects
- *
FOSSIL bees , *APIS (Insects) , *PALEONTOLOGY - Abstract
Fossil
Apis species from the Oligocene, Miocene and Plio-Pleistocene of Eurasia are described and their relationships with Recent species are discussed. Several new populations of fossil bees are reported from the Oligocene and Miocene of France and Spain, includingApis aquisextusensis sp. nov. The present state of knowledge of fossil bee systematics is poor because of the general lack of preserved characters. Some of the problems, and items requiring further investigation, are identified. [ABSTRACT FROM AUTHOR]- Published
- 1999
- Full Text
- View/download PDF
37. An Early Cretaceous faunal and floral continental assemblage: Las Hoyas fossil site (Cuenca, Spain)
- Author
-
Junta de Comunidades de Castilla-La Mancha, Sanz, José Luis, Wenz, Sylvie, Yébenes, Alfonso, Estes, Richard, Martínez-Delclòs, X., Jiménez, Emiliano, Diéguez, Carmen, Buscalioni, Angela D., Barbadillo, Luis Javier, Vía, Luis, Junta de Comunidades de Castilla-La Mancha, Sanz, José Luis, Wenz, Sylvie, Yébenes, Alfonso, Estes, Richard, Martínez-Delclòs, X., Jiménez, Emiliano, Diéguez, Carmen, Buscalioni, Angela D., Barbadillo, Luis Javier, and Vía, Luis
- Abstract
[EN] The fossiliferous beds of Las Hoyas (province ofCuenca, Spain) are composed of limestones (probably Late Hauterivian). The main fossiliferous facies consists of laminated limestone from a lake-basin plain with bottom waters perennially anoxic. The floral and faunal assemblage is similar to that of Montsech (prov. of Lérida, Spain), with divergences especially in the insects and some tetrapods. Bottom-dwelling invertebrates are scarce. Most of invertebrates are arthropods: three crustaceans and a relatively diversified entomofauna. The fishes are the main component of the vertebrate fauna both in number of individuals and diversity (13 different taxa). Among tetrapods the most abundant is a new genus of Caudata. Reptiles are represented by a chelonian, a little lizard and an atoposaurid crocodile. Finally, a new bird is reported from Las Hoyas, with an intermediate phylogenetic position between Archaeopteryx and Ornithurae., [FR] Les couches à fossiles de Las Hoyas (province deCuenca, Espagne) sont composées de calcaires d'âge Hauterivien supérieur — Barrémien inférieur, probablement) de milieu lacustre. Le principal faciès fossilifère est fait de calcaires laminés qui proviennent d'eaux profondes anoxiques. L'assemblage floral et faunique est similaire à celui du Montsech (prov. de Lérida, Espagne), avec des divergences surtout dans les insectes et quelques tétrapodes. Les invertébrés benthoniques sont rares. La plupart des invertébrés sont des arthropodes: trois crustacés et une entomofaune relativement diversifiée. La faune de vertébrés la plus importante est composée par des poissons tant en nombre d'échantillons qu'en diversité (13 taxa différents). Parmi les tétrapodes, le plus abondant est un nouveau genre de Caudata. Les reptiles sont représentés par une tortue, un petit lézard et un crocodile atoposauride. Finalement, un nouvel oiseau est reconnu dans Las Hoyas, avec une position phylogénétique intermédiaire entre Archaeopteryx et les Ornithurae.
- Published
- 1988
38. Geografía de la crisis inmobiliaria en Cataluña: una lectura a partir de los desahucios por ejecución hipotecaria
- Author
-
Gutiérrez, A., Delclòs, X., GRATET. Anàlisi Territorial i Estudis Turístics, Geografia, and Universitat Rovira i Virgili
- Subjects
Catalonia ,Economics and business ,Crisi econòmica del 2008 -- Catalunya ,1138-9788 ,Desnonament ,Evictions ,Economia i empresa ,Economía y empresa ,Financialisation - Abstract
Filiació URV: SI El estallido de la burbuja inmobiliaria y la crisis financiera global han permitido destapar de forma más evidente las consecuencias del modelo inmobiliario español, basado en la concepción de la vivienda como un instrumento de creación y apropiación de rentas, y apoyado en una progresiva financiarización de la vivienda. Así, la proliferación de vivienda vacía o inacabada, mientras se desbocan los desahucios, representa la principal manifestación de una situación paradójica. El trabajo desarrolla un análisis en clave territorial de la crisis inmobiliaria en Cataluña. Para ello, una de las variables clave es el estudio de los desahucios por ejecución hipotecaria. Ante la falta de datos oficiales sobre el volumen y distribución de este fenómeno a una escala inferior a la provincial o a la del partido judicial, el trabajo propone el uso de las viviendas de segunda mano propiedad de la banca como fuente secundaria alternativa. Ello permite desarrollar una aproximación a este fenómeno a escala inframunicipal a través de tres casos de estudio (Tarragona, Terrassa y Salt). Además de confirmar la utilidad de esta fuente, los resultados del trabajo permiten demostrar empíricamente como los desahucios por ejecución hipotecaria han tendido a concentrarse en aquellos barrios más desfavorecidos, contribuyendo, así, a profundizar la desigualdad en las ciudades. The bursting of the real estate bubble and the onset of global financial crisis have allowed to unmask the consequences of the Spanish real estate model, which has been based on the conception of housing as an instrument for the creation and appropriation of urban rents, supported by a progressive financiarization of the built environment. Thus, the proliferation of vacant or unfinished housing together with a f
39. ¿Hipertrofia inmobiliaria? Análisis de las pautas territoriales del boom e implicaciones del estallido de la burbuja en Cataluña
- Author
-
Gutiérrez, A., Delclòs, X., GRATET. Anàlisi Territorial i Estudis Turístics, Geografia, and Universitat Rovira i Virgili
- Subjects
Geografía ,Geography ,sobreproducción de vivienda ,urbanismo expansivo ,Crisis econòmiques -- Catalunya -- 2008 ,0210-5462 ,Boom inmobiliario ,Geografia - Abstract
http://revistaseug.ugr.es/index.php/cuadgeo/article/view/2527 Filiació URV: SI El trabajo desarrolla un análisis de las implicaciones territoriales de la producción de vivienda en Cataluña durante los años del boom inmobiliario. Se analiza la desigual distribución espacial de los impactos derivados del elevado volumen de producción combinados con la actual crisis inmobiliaria, así como las lógicas espaciales que subyacen en estos procesos. La proliferación de viviendas inacabadas y vacías presenta una distribución territorial que permite identificar territorios afectados por la sobreproducción y/o con una mayor concentración de expectativas de negocio inmobiliario frustrado. El estudio de los impactos territoriales de la crisis inmobiliaria actual no puede analizarse de forma separada a la huella generada por la hipertrofia inmobiliaria precedente. Por ello, las pautas territoriales de efectos derivados de ésta (viviendas vacías e inacabadas) se situarán en relación a las lógicas espaciales de la producción de vivienda durante el boom, a sus vínculos con un modelo de urbanizador expansivo y, en definitiva, a una geografía de la producción de vivienda en Cataluña. This paper develops an analysis of the uneven spatial impact of housing production in Catalonia during the real estate boom. It highlights the uneven spatial distribution of the impacts resulting from the housing production in combination with the current economic crisis, as well as the spatial logic underlying these processes. The proliferation of unfinished and vacant dwellings shows a spatial distribution that identifies the most affected areas of overproduction and/or with a higher concentration of frustrated real estate expectations. The study of the spatial impact of the current housing crisis cannot be ana
40. The permo-triassic odonatoptera of the 'protodonate' grade (Insecta : Odonatoptera)
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Nel, A., Bethoux, O., Günter Bechly, Martínez-Delclòs, X., and Papier, F.
41. The impact of thermogenesis on the origin of insect pollination.
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Peris D, Postigo-Mijarra JM, Peñalver E, Pellicer J, Labandeira CC, Peña-Kairath C, Pérez-Lorenzo I, Sauquet H, Delclòs X, and Barrón E
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- Animals, Biological Evolution, Magnoliopsida physiology, Fossils, Pollination, Insecta physiology, Thermogenesis physiology
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Thermogenesis in plants is the ability to raise their temperature above that of the surrounding air through metabolic processes, and is especially detected in reproductive organs. Warming benefits plants by facilitating the transmission of odours and compounds that attract insects. As a result, these plants increase their odds of being pollinated by the attracted insect. Modern thermogenesis has been reported in extant cycads and a small number of angiosperm lineages. Although thermogenesis is not directly preserved in the fossil record, it can be inferred by examining extant thermogenic plant lineages and comparing their features with those of the fossil record. We suggest that thermogenesis has probably occurred in seed plants for at least the past 200 million years, long before the origin of angiosperms. Thermogenesis in plants is an important factor that facilitated entomophilous pollination by enhancing the attraction of insects, complementary to other factors, thereby participating in the success of the two groups of organisms and providing many facets of past and recent reproductive biology for future exploration., (© 2024. Springer Nature Limited.)
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- 2024
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42. Insect pollination in deep time.
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Peña-Kairath C, Delclòs X, Álvarez-Parra S, Peñalver E, Engel MS, Ollerton J, and Peris D
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- Animals, Insecta, Fossils, Flowers, Pollination, Ecosystem
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Inferring insect pollination from compression fossils and amber inclusions is difficult because of a lack of consensus on defining an insect pollinator and the challenge of recognizing this ecological relationship in deep time. We propose a conceptual definition for such insects and an operational classification into pollinator or presumed pollinator. Using this approach, we identified 15 insect families that include fossil pollinators and show that pollination relationships have existed since at least the Upper Jurassic (~163 Ma). Insects prior to this can only be classified as presumed pollinators. This gives a more nuanced insight into the origin and evolution of an ecological relationship that is vital to the establishment, composition and conservation of modern terrestrial ecosystems., Competing Interests: Declaration of interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)
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- 2023
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43. Damselflies (Coenagrionidae) have been avoiding leaf veins during oviposition for at least 52 million years.
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Romero-Lebrón E, Fernández-Monescillo M, Matushkina N, Delclòs X, and Gleiser RM
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Plant-insect interactions can provide extremely valuable information for reconstructing the oviposition behavior. We have studied about 1350 endophytic egg traces of coenagrionid damselflies (Odonata: Zygoptera) from the Eocene, identifying triangular or drop-shaped scars associated with them. This study aims to determine the origin of these scars. Our behavioral study of about 1,800 endophytic eggs from recent coenagrionids indicates that these scars were caused by ovipositor incisions, but without egg insertion. The scar correlates (χ2-test) with leaf veins in both fossil and extant species. We infer that a female would detect the proximity of a leaf vein and avoid egg-laying, generating a scar that also fossilizes. For the first time, a scar produced by the ovipositor has been identified, indicating the existence of undesirable areas for oviposition. Accordingly, we recognize that Coenagrionidae damselflies (narrow-winged damselflies or pond damselflies) have been avoiding leaf veins for at least 52 million years., Competing Interests: The authors declare that they have no conflicts of interest., (© 2023 The Authors.)
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- 2023
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44. Symbiosis between Cretaceous dinosaurs and feather-feeding beetles.
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Peñalver E, Peris D, Álvarez-Parra S, Grimaldi DA, Arillo A, Chiappe L, Delclòs X, Alcalá L, Sanz JL, Solórzano-Kraemer MM, and Pérez-de la Fuente R
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- Animals, Feathers anatomy & histology, Symbiosis, Amber, Ecosystem, Fossils, Birds anatomy & histology, Biological Evolution, Mammals, Dinosaurs anatomy & histology, Coleoptera
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Extant terrestrial vertebrates, including birds, have a panoply of symbiotic relationships with many insects and arachnids, such as parasitism or mutualism. Yet, identifying arthropod-vertebrate symbioses in the fossil record has been based largely on indirect evidence; findings of direct association between arthropod guests and dinosaur host remains are exceedingly scarce. Here, we present direct and indirect evidence demonstrating that beetle larvae fed on feathers from an undetermined theropod host (avian or nonavian) 105 million y ago. An exceptional amber assemblage is reported of larval molts (exuviae) intimately associated with plumulaceous feather and other remains, as well as three additional amber pieces preserving isolated conspecific exuviae. Samples were found in the roughly coeval Spanish amber deposits of El Soplao, San Just, and Peñacerrada I. Integration of the morphological, systematic, and taphonomic data shows that the beetle larval exuviae, belonging to three developmental stages, are most consistent with skin/hide beetles (family Dermestidae), an ecologically important group with extant keratophagous species that commonly inhabit bird and mammal nests. These findings show that a symbiotic relationship involving keratophagy comparable to that of beetles and birds in current ecosystems existed between their Early Cretaceous relatives.
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- 2023
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45. Necrophagy by insects in Oculudentavis and other lizard body fossils preserved in Cretaceous amber.
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Solórzano-Kraemer MM, Peñalver E, Herbert MCM, Delclòs X, Brown BV, Aung NN, and Peretti AM
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- Animals, Amber, Fossils, Insecta, Resins, Plant, Lizards, Arthropods, Ants
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When a vertebrate carcass begins its decay in terrestrial environments, a succession of different necrophagous arthropod species, mainly insects, are attracted. Trophic aspects of the Mesozoic environments are of great comparative interest, to understand similarities and differences with extant counterparts. Here, we comprehensively study several exceptional Cretaceous amber pieces, in order to determine the early necrophagy by insects (flies in our case) on lizard specimens, ca. 99 Ma old. To obtain well-supported palaeoecological data from our amber assemblages, special attention has been paid in the analysis of the taphonomy, succession (stratigraphy), and content of the different amber layers, originally resin flows. In this respect, we revisited the concept of syninclusion, establishing two categories to make the palaeoecological inferences more accurate: eusyninclusions and parasyninclusions. We observe that resin acted as a "necrophagous trap". The lack of dipteran larvae and the presence of phorid flies indicates decay was in an early stage when the process was recorded. Similar patterns to those in our Cretaceous cases have been observed in Miocene ambers and actualistic experiments using sticky traps, which also act as "necrophagous traps"; for example, we observed that flies were indicative of the early necrophagous stage, but also ants. In contrast, the absence of ants in our Late Cretaceous cases confirms the rareness of ants during the Cretaceous and suggests that early ants lacked this trophic strategy, possibly related to their sociability and recruitment foraging strategies, which developed later in the dimensions we know them today. This situation potentially made necrophagy by insects less efficient in the Mesozoic., (© 2023. The Author(s).)
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- 2023
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46. A braconid wasp (Hymenoptera, Braconidae) from the Lower Cretaceous amber of San Just, eastern Iberian Peninsula.
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Álvarez-Parra S, Peñalver E, Delclòs X, and Engel MS
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Braconid parasitoid wasps are a widely diversified group today, while their fossil record from the Mesozoic is currently poorly known. Here, we describe Utrillabraconelectropteron Álvarez-Parra & Engel, gen. et sp. nov. , from the upper Albian (Lower Cretaceous) amber of San Just in the eastern Iberian Peninsula. The holotype specimen is incomplete, although the forewing and hind wing venation are well preserved. The new taxon is assigned to the subfamily †Protorhyssalinae (Braconidae) and, based on characteristics of the wing venation, seems to be closely related to Protorhyssalusgoldmani Basibuyuk & Quicke, 1999 and Diorhyssalusallani (Brues, 1937), both from Upper Cretaceous ambers of North America. We discuss the taxonomy of the Cretaceous braconids, considering †Seneciobraconinae as a valid subfamily. We also comment on possible relationships within †Protorhyssalinae, although a phylogenetic analysis is necessary. Additionally, a checklist is included of braconids known from Cretaceous ambers., (Sergio Álvarez-Parra, Enrique Peñalver, Xavier Delclòs, Michael S. Engel.)
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- 2022
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47. Origin and evolution of fungus farming in wood-boring Coleoptera - a palaeontological perspective.
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Peris D, Delclòs X, and Jordal B
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- Agriculture, Animals, Fungi genetics, Humans, Phylogeny, Symbiosis, Wood, Coleoptera genetics, Coleoptera microbiology
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Insect-fungus mutualism is one of the better-studied symbiotic interactions in nature. Ambrosia fungi are an ecological assemblage of unrelated fungi that are cultivated by ambrosia beetles in their galleries as obligate food for larvae. Despite recently increased research interest, it remains unclear which ecological factors facilitated the origin of fungus farming, and how it transformed into a symbiotic relationship with obligate dependency. It is clear from phylogenetic analyses that this symbiosis evolved independently many times in several beetle and fungus lineages. However, there is a mismatch between palaeontological and phylogenetic data. Herein we review, for the first time, the ambrosia system from a palaeontological perspective. Although largely ignored, families such as Lymexylidae and Bostrichidae should be included in the list of ambrosia beetles because some of their species cultivate ambrosia fungi. The estimated origin for some groups of ambrosia fungi during the Cretaceous concurs with a known high diversity of Lymexylidae and Bostrichidae at that time. Although potentially older, the greatest radiation of various ambrosia beetle lineages occurred in the weevil subfamilies Scolytinae and Platypodinae during the Eocene. In this review we explore the evolutionary relationship between ambrosia beetles, fungi and their host trees, which is likely to have persisted for longer than previously supposed., (© 2021 The Authors. Biological Reviews published by John Wiley & Sons Ltd on behalf of Cambridge Philosophical Society.)
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- 2021
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48. Dinosaur bonebed amber from an original swamp forest soil.
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Álvarez-Parra S, Pérez-de la Fuente R, Peñalver E, Barrón E, Alcalá L, Pérez-Cano J, Martín-Closas C, Trabelsi K, Meléndez N, López Del Valle R, Lozano RP, Peris D, Rodrigo A, Sarto I Monteys V, Bueno-Cebollada CA, Menor-Salván C, Philippe M, Sánchez-García A, Peña-Kairath C, Arillo A, Espílez E, Mampel L, and Delclòs X
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- Animals, Biodiversity, Forests, Soil, Spain, Wetlands, Amber, Dinosaurs, Fossils
- Abstract
Dinosaur bonebeds with amber content, yet scarce, offer a superior wealth and quality of data on ancient terrestrial ecosystems. However, the preserved palaeodiversity and/or taphonomic characteristics of these exceptional localities had hitherto limited their palaeobiological potential. Here, we describe the amber from the Lower Cretaceous dinosaur bonebed of Ariño (Teruel, Spain) using a multidisciplinary approach. Amber is found in both a root layer with amber strictly in situ and a litter layer mainly composed of aerial pieces unusually rich in bioinclusions, encompassing 11 insect orders, arachnids, and a few plant and vertebrate remains, including a feather. Additional palaeontological data-charophytes, palynomorphs, ostracods- are provided. Ariño arguably represents the most prolific and palaeobiologically diverse locality in which fossiliferous amber and a dinosaur bonebed have been found in association, and the only one known where the vast majority of the palaeontological assemblage suffered no or low-grade pre-burial transport. This has unlocked unprecedentedly complete and reliable palaeoecological data out of two complementary windows of preservation-the bonebed and the amber-from the same site., Competing Interests: SÁ, RP, EP, EB, LA, JP, CM, KT, NM, RL, RL, DP, AR, VS, CB, CM, MP, AS, CP, AA, EE, LM, XD No competing interests declared, (© 2021, Álvarez-Parra et al.)
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- 2021
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49. Cretaceous amniote integuments recorded through a taphonomic process unique to resins.
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Álvarez-Parra S, Delclòs X, Solórzano-Kraemer MM, Alcalá L, and Peñalver E
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Fossil records of vertebrate integuments are relatively common in both rocks, as compressions, and amber, as inclusions. The integument remains, mainly the Mesozoic ones, are of great interest due to the panoply of palaeobiological information they can provide. We describe two Spanish Cretaceous amber pieces that are of taphonomic importance, one bearing avian dinosaur feather remains and the other, mammalian hair. The preserved feather remains originated from an avian dinosaur resting in contact with a stalactite-shaped resin emission for the time it took for the fresh resin to harden. The second piece shows three hair strands recorded on a surface of desiccation, with the characteristic scale pattern exceptionally well preserved and the strands aligned together, which can be considered the record of a tuft. These assemblages were recorded through a rare biostratinomic process we call "pull off vestiture" that is different from the typical resin entrapment and embedding of organisms and biological remains, and unique to resins. The peculiarity of this process is supported by actualistic observations using sticky traps in Madagascar. Lastly, we reinterpret some exceptional records from the literature in the light of that process, thus bringing new insight to the taphonomic and palaeoecological understanding of the circumstances of their origins.
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- 2020
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50. A revised definition for copal and its significance for palaeontological and Anthropocene biodiversity-loss studies.
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Solórzano-Kraemer MM, Delclòs X, Engel MS, and Peñalver E
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The early fossilization steps of natural resins and associated terminology are a subject of constant debate. Copal and resin are archives of palaeontological and historical information, and their study is critical to the discovery of new and/or recently extinct species and to trace changes in forests during the Holocene. For such studies, a clear, suitable definition for copal is vital and is herein established. We propose an age range for copal (2.58 Ma-1760 AD), including Pleistocene and Holocene copals, and the novel term "Defaunation resin", defined as resin produced after the commencement of the Industrial Revolution. Defaunation resin is differentiated from Holocene copal as it was produced during a period of intense human transformative activities. Additionally, the "Latest Amber Bioinclusions Gap" (LABG) since the late Miocene to the end of the Pleistocene is hereby newly defined, and is characterized by its virtual absence of bioinclusions and the consequent lack of palaeontological information, which in part explains the historical differentiation between amber and copal. Crucial time intervals in the study of resin production, and of the biodiversity that could be contained, are now clarified, providing a framework for and focusing future research on bioinclusions preserved in copal and resin.
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- 2020
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