10 results on '"Szucsich N"'
Search Results
2. Integrative systematics in Protura: from chaetotaxy to DNA
- Author
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Galli, Loris, Bartel, D., Capurro, Matteo, Pass, G., Sara', Antonio, and Szucsich, N.
- Published
- 2015
3. Redescription and review of the most abundant conehead in Italy:Acerentomon italicumNosek, 1969 (Protura: Acerentomidae)
- Author
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Galli, L., primary, Bartel, D., additional, Capurro, M., additional, Pass, G., additional, Sará, A., additional, Shrubovych, J., additional, and Szucsich, N., additional
- Published
- 2015
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4. DNA barcoding of crickets, katydids and grasshoppers (Orthoptera) from Central Europe with focus on Austria, Germany and Switzerland.
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Hawlitschek, O., Morinière, J., Lehmann, G. U. C., Lehmann, A. W., Kropf, M., Dunz, A., Glaw, F., Detcharoen, M., Schmidt, S., Hausmann, A., Szucsich, N. U., Caetano ‐ Wyler, S. A., and Haszprunar, G.
- Subjects
GENETIC barcoding ,INSECT genetics ,ORTHOPTERA ,PSEUDOGENES ,GENETIC markers ,INSECT hybridization - Abstract
We present a DNA barcoding study on the insect order Orthoptera that was generated in collaboration between four barcoding projects in three countries, viz. Barcoding Fauna Bavarica (Germany), German Barcode of Life, Austrian Barcode of Life and Swiss Barcode of Life. Our data set includes 748 COI sequences from 127 of the 162 taxa (78.4%) recorded in the three countries involved. Ninety-three of these 122 species (76.2%, including all Ensifera) can be reliably identified using DNA barcodes. The remaining 26 caeliferan species (families Acrididae and Tetrigidae) form ten clusters that share barcodes among up to five species, in three cases even across different genera, and in six cases even sharing individual barcodes. We discuss incomplete lineage sorting and hybridization as most likely causes of this phenomenon, as the species concerned are phylogenetically young and hybridization has been previously observed. We also highlight the problem of nuclear mitochondrial pseudogenes (numts), a known problem in the barcoding of orthopteran species, and the possibility of Wolbachia infections. Finally, we discuss the possible taxonomic implications of our barcoding results and point out future research directions. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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5. Redescription and review of the most abundant conehead in Italy: Acerentomon italicum Nosek, 1969 (Protura: Acerentomidae).
- Author
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Galli, L., Bartel, D., Capurro, M., Pass, G., Sará, A., Shrubovych, J., and Szucsich, N.
- Subjects
PROTURA ,DNA data banks ,PHENOLOGY ,LITTER (Trash) ,SEX ratio - Abstract
Acerentomon italicumis the most abundant species of Protura in Italy. In this paper,A. italicumis redescribed according to the most recent revision of diagnostic characters (morphometry, porotaxy), examining the type material and 59 specimens from 11 different localities in our collection. For some characters, scanning electron microscope (SEM) pictures are presented. An updated detailed catalogue extracted from the authors’ database is provided:A. italicumis reported from 91 Italian localities (mainly from Northern Italian regions) in a total of 520 ♂♂, 669 ♀♀, 28 pre-imagines, 69 maturi junior, 25 larvae II, four larvae I and eight undetermined. Few specimens were collected in Switzerland (two, about 5 km away from the Italian border), Austria (three), Slovenia (one) and Corsica (eight). The entire data set is analysed for information on phenology (juveniles detectable every month in Liguria and Tuscany, but only during spring–summer in the remaining regions of Northern Italy) and sex ratio (M:F = 0.78) of this species.A. italicumwas collected in localities from 0 to 2000 m above sea level in the soil and litter of pure and mixed forest. The geological substratum, when recorded, was limestone, quartz/mica schists and conglomerates. The DNA barcode is newly provided for 21 representatives from three Italian populations ofA. italicum. [ABSTRACT FROM AUTHOR]
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- 2016
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6. Flies and concealed nectar sources: morphological innovations in the proboscis of Bombyliidae (Diptera)
- Author
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Szucsich, N. U., primary and Krenn, H. W., additional
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- 2002
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7. Brain anatomy in Diplura (Hexapoda)
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Böhm Alexander, Szucsich Nikolaus U, and Pass Günther
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Diplura ,two-pronged bristletails ,mushroom body ,central body ,3D reconstruction ,CNS ,DC0 ,apterygote insects ,Zoology ,QL1-991 - Abstract
Abstract Background In the past decade neuroanatomy has proved to be a valuable source of character systems that provide insights into arthropod relationships. Since the most detailed description of dipluran brain anatomy dates back to Hanström (1940) we re-investigated the brains of Campodea augens and Catajapyx aquilonaris with modern neuroanatomical techniques. The analyses are based on antibody staining and 3D reconstruction of the major neuropils and tracts from semi-thin section series. Results Remarkable features of the investigated dipluran brains are a large central body, which is organized in nine columns and three layers, and well developed mushroom bodies with calyces receiving input from spheroidal olfactory glomeruli in the deutocerebrum. Antibody staining against a catalytic subunit of protein kinase A (DC0) was used to further characterize the mushroom bodies. The japygid Catajapyx aquilonaris possesses mushroom bodies which are connected across the midline, a unique condition within hexapods. Conclusions Mushroom body and central body structure shows a high correspondence between japygids and campodeids. Some unique features indicate that neuroanatomy further supports the monophyly of Diplura. In a broader phylogenetic context, however, the polarization of brain characters becomes ambiguous. The mushroom bodies and the central body of Diplura in several aspects resemble those of Dicondylia, suggesting homology. In contrast, Archaeognatha completely lack mushroom bodies and exhibit a central body organization reminiscent of certain malacostracan crustaceans. Several hypotheses of brain evolution at the base of the hexapod tree are discussed.
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- 2012
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8. Can comprehensive background knowledge be incorporated into substitution models to improve phylogenetic analyses? A case study on major arthropod relationships
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Luan Yun-xia, Stocsits Roman R, Letsch Harald O, Simon Sabrina, Gowri-Shankar Vivek, Bartel Daniela, Dell'Ampio Emiliano, Szucsich Nikolaus U, Meusemann Karen, von Reumont Björn M, Wägele Johann, Pass Günther, Hadrys Heike, and Misof Bernhard
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Evolution ,QH359-425 - Abstract
Abstract Background Whenever different data sets arrive at conflicting phylogenetic hypotheses, only testable causal explanations of sources of errors in at least one of the data sets allow us to critically choose among the conflicting hypotheses of relationships. The large (28S) and small (18S) subunit rRNAs are among the most popular markers for studies of deep phylogenies. However, some nodes supported by this data are suspected of being artifacts caused by peculiarities of the evolution of these molecules. Arthropod phylogeny is an especially controversial subject dotted with conflicting hypotheses which are dependent on data set and method of reconstruction. We assume that phylogenetic analyses based on these genes can be improved further i) by enlarging the taxon sample and ii) employing more realistic models of sequence evolution incorporating non-stationary substitution processes and iii) considering covariation and pairing of sites in rRNA-genes. Results We analyzed a large set of arthropod sequences, applied new tools for quality control of data prior to tree reconstruction, and increased the biological realism of substitution models. Although the split-decomposition network indicated a high noise content in the data set, our measures were able to both improve the analyses and give causal explanations for some incongruities mentioned from analyses of rRNA sequences. However, misleading effects did not completely disappear. Conclusion Analyses of data sets that result in ambiguous phylogenetic hypotheses demand for methods, which do not only filter stochastic noise, but likewise allow to differentiate phylogenetic signal from systematic biases. Such methods can only rely on our findings regarding the evolution of the analyzed data. Analyses on independent data sets then are crucial to test the plausibility of the results. Our approach can easily be extended to genomic data, as well, whereby layers of quality assessment are set up applicable to phylogenetic reconstructions in general.
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- 2009
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9. Identification and Spread of the Ghost Silverfish ( Ctenolepisma calvum ) among Museums and Homes in Europe.
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Querner P, Szucsich N, Landsberger B, Erlacher S, Trebicki L, Grabowski M, and Brimblecombe P
- Abstract
Ctenolepisma calvum was first described in Sri Lanka (Ceylon) in 1910, and this island is probably the origin of this species. Later, it was also found in the Caribbean (Cuba and Trinidad and Tobago). Up until the present, it has only been identified within buildings (a synanthropic species), and its natural habitat is unknown. In 2007, it was discovered in Germany and was considered a neobiotic species of Lepismatidae in Europe. It has rapidly spread throughout Europe and beyond in recent years. This led us to analyze the available data of the first occurrences in Germany, Austria, and other European countries. Furthermore, we compared the spread inside of museums in Vienna (Austria) and Berlin (Germany). These museums have been monitored for a long period with sticky traps, representing the best source of information on the dispersion dynamics of Ctenolepisma calvum . We found a scattered occurrence of this species in 18 countries in Europe (including Russia and Ukraine). The first record for Poland has not previously been published; however, this species has been present there since 2014. Surprisingly, it was found in Hungary in 2003, but a record was only published online in 2021. Additionally, in Germany and Austria, where most data are available, the spread of the species does not follow any clear pattern. In museums in Berlin, the species has only been found in one location. In contrast, the species rapidly spread in museums in Vienna between 2014 and 2021, from four to 30 locations, and it is now a well-established species with occasional high abundance. We examined the spread of the species at three spatial scales: (i) Europe, (ii) national, and (iii) regional. Our observations indicate that it is possibly distributed with materials (packaging material, hygiene articles, paper, cardboard, and collection items). Little is yet known about the biology of this introduced pest. We describe its preferred habitat within buildings, its climate requirements, and its potential to act as a new museum pest in Central Europe. This species seems to thrive at room temperature in buildings. Further impact on the species due to climate change in the future is also discussed. We offer a simple morphological key and a detailed identification table to help correct species identification.
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- 2022
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10. DNA barcode reference libraries for the monitoring of aquatic biota in Europe: Gap-analysis and recommendations for future work.
- Author
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Weigand H, Beermann AJ, Čiampor F, Costa FO, Csabai Z, Duarte S, Geiger MF, Grabowski M, Rimet F, Rulik B, Strand M, Szucsich N, Weigand AM, Willassen E, Wyler SA, Bouchez A, Borja A, Čiamporová-Zaťovičová Z, Ferreira S, Dijkstra KB, Eisendle U, Freyhof J, Gadawski P, Graf W, Haegerbaeumer A, van der Hoorn BB, Japoshvili B, Keresztes L, Keskin E, Leese F, Macher JN, Mamos T, Paz G, Pešić V, Pfannkuchen DM, Pfannkuchen MA, Price BW, Rinkevich B, Teixeira MAL, Várbíró G, and Ekrem T
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- Europe, Aquatic Organisms, Biota, DNA Barcoding, Taxonomic statistics & numerical data, Environmental Monitoring, Gene Library
- Abstract
Effective identification of species using short DNA fragments (DNA barcoding and DNA metabarcoding) requires reliable sequence reference libraries of known taxa. Both taxonomically comprehensive coverage and content quality are important for sufficient accuracy. For aquatic ecosystems in Europe, reliable barcode reference libraries are particularly important if molecular identification tools are to be implemented in biomonitoring and reports in the context of the EU Water Framework Directive (WFD) and the Marine Strategy Framework Directive (MSFD). We analysed gaps in the two most important reference databases, Barcode of Life Data Systems (BOLD) and NCBI GenBank, with a focus on the taxa most frequently used in WFD and MSFD. Our analyses show that coverage varies strongly among taxonomic groups, and among geographic regions. In general, groups that were actively targeted in barcode projects (e.g. fish, true bugs, caddisflies and vascular plants) are well represented in the barcode libraries, while others have fewer records (e.g. marine molluscs, ascidians, and freshwater diatoms). We also found that species monitored in several countries often are represented by barcodes in reference libraries, while species monitored in a single country frequently lack sequence records. A large proportion of species (up to 50%) in several taxonomic groups are only represented by private data in BOLD. Our results have implications for the future strategy to fill existing gaps in barcode libraries, especially if DNA metabarcoding is to be used in the monitoring of European aquatic biota under the WFD and MSFD. For example, missing species relevant to monitoring in multiple countries should be prioritized for future collaborative programs. We also discuss why a strategy for quality control and quality assurance of barcode reference libraries is needed and recommend future steps to ensure full utilisation of metabarcoding in aquatic biomonitoring., (Copyright © 2019 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2019
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