16 results on '"Amat, E."'
Search Results
2. CMOS-compatible manufacturability of sub-15 nm Si/SiO2/Si nanopillars containing single Si nanodots for single electron transistor applications
- Author
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(0000-0001-9449-9356) Borany, J., Engelmann, H.-J., (0000-0002-0457-1164) Heinig, K.-H., (0000-0001-9214-0331) Amat, E., (0000-0001-7192-716X) Hlawacek, G., (0000-0003-0515-022X) Klüpfel, F., (0000-0002-5200-6928) Hübner, R., (0000-0002-9068-8384) Möller, W., Pourteau, M.-L., (0000-0002-9113-4113) Rademaker, G., (0000-0002-1141-3228) Rommel, M., Baier, L., (0000-0002-8155-8895) Pichler, P., (0000-0002-4647-8558) Perez-Murano, F., (0000-0002-4772-3295) Tiron, R., (0000-0001-9449-9356) Borany, J., Engelmann, H.-J., (0000-0002-0457-1164) Heinig, K.-H., (0000-0001-9214-0331) Amat, E., (0000-0001-7192-716X) Hlawacek, G., (0000-0003-0515-022X) Klüpfel, F., (0000-0002-5200-6928) Hübner, R., (0000-0002-9068-8384) Möller, W., Pourteau, M.-L., (0000-0002-9113-4113) Rademaker, G., (0000-0002-1141-3228) Rommel, M., Baier, L., (0000-0002-8155-8895) Pichler, P., (0000-0002-4647-8558) Perez-Murano, F., and (0000-0002-4772-3295) Tiron, R.
- Abstract
This study addresses the complementary metal-oxide-semiconductor-compatible fabrication of vertically stacked Si/SiO2/Si nanopillars (NPs) with embedded Si nanodots (NDs) as key functional elements of a quantum-dot-based, gate-all-around single-electron transistor (SET) operating at room temperature. The main geometrical parameters of the NPs and NDs were deduced from SET device simulations using the nextnano++ program package. The basic concept for single silicon ND formation within a confined oxide volume was deduced from Monte-Carlo simulations of ion-beam mixing and SiOx phase separation. A process flow was developed and experimentally implemented by combining bottom-up (Si ND self-assembly) and top-down (ion-beam mixing, electron-beam lithography, reactive ion etching) technologies, fully satisfying process requirements of future 3D device architectures. The theoretically predicted self-assembly of a single Si ND via phase separation within a confined SiOx disc of < 500 nm³ volume was experimentally validated. This work describes in detail the optimization of conditions required for NP/ND formation, such as the oxide thickness, energy and fluence of ion-beam mixing, thermal budget for phase separation and parameters of reactive ion beam etching. Low-temperature plasma oxidation was used to further reduce NP diameter and for gate oxide fabrication whilst preserving the pre-existing NDs. The influence of critical dimension variability on the SET functionality and options to reduce such deviations are discussed. We finally demonstrate the reliable formation of Si quantum dots with diameters of less than 3 nm in the oxide layer of a stacked Si/SiO2/Si NP of 10 nm diameter, with tunnelling distances of about 1 nm between the Si ND and the neighboured Si regions forming drain and source of the SET.
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- 2023
3. CMOS compatible manufacturing of a hybrid SET-FET circuit
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del Moral, A, primary, Amat, E, additional, Engelmann, H-J, additional, Pourteau, M-L, additional, Rademaker, G, additional, Quirion, D, additional, Torres-Herrero, N, additional, Rommel, M, additional, Heinig, K-H, additional, von Borany, J, additional, Tiron, R, additional, Bausells, J, additional, and Perez-Murano, F, additional
- Published
- 2022
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4. Knowlege and attitude in paediatric dentistry among paediatricians
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Morera-Domingo, J, Maura-Solivellas, I, Llagostera-Benedico, J, Arce-Casas, A, Valls-Sirera, C, and Ferrés-Amat, E
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Fluorides ,Cross-Sectional Studies ,Pediatric Dentistry ,Surveys and Questionnaires ,Humans ,Pediatricians ,Child ,Toothpastes - Abstract
Tooth decay is the main oral pathology and a worldwide public health problem. The paediatrician is the first medical professional to assess and treat children. Therefore, it is important that they are well informed. The aim is to determine the level of dental knowledge of paediatricians practising in the public and private health sectors in Catalonia (Spain).Cross-sectional, descriptive, and analytical study of the basic dental knowledge of paediatricians through an anonymous and voluntary survey of 17 questions on prevention, trauma and dental cavities. The results are segmented based on professional experience, type of centre and whether it has a paediatric dentistry area.A total of 129 paediatricians from Catalonia participated. Almost all paediatricians (86.82%) normally perform an oral examination in a routine visit; 31.8% refer the child to the paediatric dentist when the first permanent molars have erupted, and 41.9% indicate that toothpaste should contain a minimum of 1,000 ppm of fluoride. It is proven that paediatricians practising in the private sector have greater dental knowledge than those in the public sector (p = 0.019). Experience is not related to knowledge (p = 0.0691). The paediatricians who have a paediatric dentistry area in their workplace show greater knowledge (p = 0.046).Only half of the surveyed paediatricians follow the recommendations of paediatric societies on prevention aspects. In dental traumatology, professionals mostly follow the recommendations supported by the literature with high scientific evidence.
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- 2022
5. Exploring the stacking of devices in a vertical nanowire to implement IC
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Amat, E., primary, del Moral, A., additional, Soler, V., additional, Bausells, J., additional, and Perez-Murano, F., additional
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- 2022
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6. CMOS compatible manufacturing of a hybrid SET-FET circuit
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Del Moral, A., Amat, E., Engelmann, H.-J., Pourteau, M.-L., Rademaker, G., Quirion, D., Torres-Herrero, N., Rommel, M., Heinig, K.-H., Borany, J., Tiron, R., Bausells, J., Perez-Murano, F., Del Moral, A., Amat, E., Engelmann, H.-J., Pourteau, M.-L., Rademaker, G., Quirion, D., Torres-Herrero, N., Rommel, M., Heinig, K.-H., Borany, J., Tiron, R., Bausells, J., and Perez-Murano, F.
- Abstract
This study analyzes the CMOS compatibility in the manufacturing of a hybrid SET-FET circuit. The fundamental element towards an operating SET at room temperature is a vertical nanopillar with embedded Si nanodot generated by ion-beam irradiation. The integration process from nanopillars to contacted SETs is validated by structural characterization. Then, the monolithic fabrication of planar FETs co-integrated with vertical SETs is presented, and its compatibility with standard CMOS technology is demonstrated. The work includes process optimization, pillar integrity validation, electrical characterization and simulation taking into account parasitic elements. The FET fabrication process is adapted to meet the requirements of the pre-fabricated nanopillars. Overall, this work establishes the groundwork for the realization of a hybrid SET-FET circuit operating at room temperature.
- Published
- 2022
7. Changes in the potential distribution of the guava fruit fly Anastrepha striata (Diptera, Tephritidae) under current and possible future climate scenarios in Colombia.
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Amat, E., Altamiranda-Saavedra, M., Canal, N. A., and Gómez-P, L. M.
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ANASTREPHA , *TEPHRITIDAE , *DIPTERA , *GUAVA , *BIOGEOGRAPHY , *FRUIT flies , *ORIENTAL fruit fly - Abstract
Climate change has affected the geographical distributions of most species worldwide; in particular, insects of economic importance inhabiting tropical regions have been impacted. Current and future predictions of change in geographic distribution are frequently included in species distribution models (SDMs). The potential spatial distributions of the fruit fly Anastrepha striata Schiner, the main species of agricultural importance in guava crops, under current and possible future scenarios in Colombia were modeled, and the establishment risk was assessed for each guava-producing municipality in the country. SDMs were developed using 221 geographical records in conjunction with nine scenopoetic variables. The model for current climate conditions indicated an extensive suitable area for the establishment of A. striata in the Andean region, smaller areas in the Caribbean and Pacific, and almost no areas in the Orinoquia and Amazonian regions. A brief discussion regarding the area's suitability for the fly is offered. According to the results, altitude is one of the main factors that direct the distribution of A. striata in the tropics. The Colombian guava-producing municipalities were classified according to the degree of vulnerability to fly establishment as follows: 42 were high risk, 16 were intermediate risk, and 17 were low risk. The implementation of future integrated management plans must include optimal spatial data and must consider environmental aspects, such as those suggested by the models presented here. Control decisions should aim to mitigate the positive relationship between global warming and the increase in the dispersal area of the fruit fly. [ABSTRACT FROM AUTHOR]
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- 2022
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8. Randomized Clinical Trial: Bone Bioactive Liquid Improves Implant Stability and Osseointegration.
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Al Madhoun A, Meshal K, Carrió N, Ferrés-Amat E, Ferrés-Amat E, Barajas M, Jiménez-Escobar AL, Al-Madhoun AS, Saber A, Abou Alsamen Y, Marti C, and Atari M
- Abstract
Implant stability can be compromised by factors such as inadequate bone quality and infection, leading to potential implant failure. Ensuring implant stability and longevity is crucial for patient satisfaction and quality of life. In this multicenter, randomized, double-blind clinical trial, we assessed the impact of a bone bioactive liquid (BBL) on the Galaxy TS implant's performance, stability, and osseointegration. We evaluated the impact stability, osseointegration, and pain levels using initial stability quotient (ISQ) measurements, CBCT scans, and pain assessment post-surgery. Surface analysis was performed using scanning electron microscopy (SEM) and atomic force microscopy (AFM). In vitro studies examined the BBL's effects on dental pulp pluripotent stem cells' (DPPSCs') osteogenesis and inflammation modulation in human macrophages. All implants successfully osseointegrated, as demonstrated by the results of our clinical and histological studies. The BBL-treated implants showed significantly lower pain scores by day 7 ( p < 0.00001) and improved stability by day 30 (ISQ > 62.00 ± 0.59, p < 8 × 10
-7 ). By day 60, CBCT scans revealed an increased bone area ratio in BBL-treated implants. AFM images demonstrated the BBL's softening and wettability effect on implant surfaces. Furthermore, the BBL promoted DPPSCs' osteogenesis and modulated inflammatory markers in human primary macrophages. This study presents compelling clinical and biological evidence that BBL treatment improves Galaxy TS implant stability, reduces pain, and enhances bone formation, possibly through surface tension modulation and immunomodulatory effects. This advancement holds promise for enhancing patient outcomes and implant longevity.- Published
- 2024
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9. A Retrospective Analysis of 1311 Oral Surgery Procedures Performed in a Pediatric Hospital in Barcelona: A Study of Their Characteristics and Age-Related Diagnoses.
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Ferrés-Amat E, Guinot-Jimeno F, Veloso-Durán A, Ñaupari-Pocomucha J, Ferrés-Amat E, Prats-Armengol J, Mareque-Bueno J, and Ferrés-Padró E
- Abstract
Background: Oral surgery involves the diagnosis and surgical treatment of diseases affecting the soft and hard tissues of the oral cavity and encompasses a wide range of surgical interventions. The aim of this investigation was to study the characteristics and age-related diagnoses of these oral surgeries, as well as to describe the surgical procedures performed in a pediatric oral and maxillofacial surgery service. Methods : A descriptive, retrospective, observational, and relational study was conducted on children and adolescents aged from 0 to 22 years who were treated in a pediatric oral and maxillofacial surgery service at a children's hospital. Results: We analyzed 1311 surgical interventions (51.4% were on boys and 48.6% on girls), consisting of 24.8% soft tissue surgeries, 65.9% bone and dental tissue surgeries, and 9.3% mixed tissue surgeries. The most common pathologies were tooth eruption disorders (65.9%), followed by ankyloglossia (20.5%). The most frequent treatment was wisdom teeth extraction (31.3%). A statistically significant association ( p < 0.05) was found between surgical treatments and variables such as age, sex, tissue type, and biopsy. Conclusions: This study enhances our understanding of pediatric oral surgery, emphasizing that the most common pathology is altered tooth eruption, while the most frequent surgical intervention is the extraction of wisdom teeth at different stages of development.
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- 2024
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10. New species and record of Diplosmittia Sther, 1981 (Diptera: Chironomidae, Orthocladiinae) from Brazil and Colombia.
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Dantas GPS, Amat E, and Hamada N
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- Animals, Brazil, Colombia, Chironomidae, Diptera, Lepidoptera
- Abstract
Chironomidae is a diverse Diptera family found worldwide. The genus Diplosmittia Sther, 1981, currently with 11 valid species, has been found exclusively in the New World, mainly in the Caribbean and in the northern parts of South America; only three species are recorded from Brazil and none from Colombia so far. In the present study a new species of Diplosmittia is described and illustrated based on material collected in northeastern Brazil. It appears to be most closely related to Diplosmittia beluina Andersen, 1996, but can be distinguished by morphological differences in the virga and gonostylus. Diplosmittia harrisoni Sther, 1981 is documented for the first time from Colombia, and D. carinata Sther, 1985 is formally placed as a junior synonym of D. harrisoni. In addition, an update identification key to all known species of the genus has been provide.
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- 2024
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11. A short fragment of mitochondrial DNA for the taxonomic identification of blow flies (Diptera: Calliphoridae) in northwestern South America.
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Amat E, Gómez GF, López-Rubio A, Gómez-Piñerez LM, and Albertino Rafael J
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- Animals, DNA, Mitochondrial, Calliphoridae genetics, Forensic Sciences, Electron Transport Complex IV genetics, South America, DNA Barcoding, Taxonomic, Diptera genetics
- Abstract
Blow flies are of medical, sanitary, veterinary, and forensic importance. Their accurate taxonomic identification is essential for their use in applied research. However, neotropical fauna has not been completely studied or described, and taxa identification without the required training is a difficult task. Additionally, the current morphological keys are not fitting to all extant taxa. Molecular-based approaches are widely used to overcome these issues, including the standard 5' COI barcode fragment (~650 base pairs [bp]) for identification at the species level. Here, a shorter sequence of 5' COI fragment (~342 bp) was assessed for the identification of 28 blow fly species inhabiting the northwest of South America. One tree-based (the generalized mixed Yule-coalescent-GMYC) and 3 distance-based approaches (automatic barcode gap discover - ABGD, the best close match - BCM, and the nearest neighbor - NN) analyses were performed. Noticeably, the amplification and sequencing of samples that had been preserved for up to 57 years were successful. The tree topology assigned 113 sequences to a specific taxon (70% effectiveness), while the distance approach assigned to 95 (59% effectiveness). The short fragment allowed the molecular identification of 19 species (60% of neotropical species except for the Lucilia species and Hemilucilia semidiaphana). According to these findings, the taxonomic and faunistic considerations of the blow fly fauna were provided. Overall, the short fragment approach constitutes an optimal species confirmation tool for the most common blow flies in northwestern South America., (© The Author(s) 2023. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2023
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12. Relationships between Clinical and Non-Clinical Variables concerning Traumatic Dental Injuries in Deciduous Teeth Attended in a Children's Hospital.
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Ferrés-Amat E, Díaz-Martínez C, Herrera-Martínez S, Galofré-Kessler N, Astudillo-Rozas W, Aceituno-Antezana O, Valdivia-Gandur I, and Maura-Solivellas I
- Abstract
This study aimed to describe Traumatic Dental Injuries (TDI) in a child population, with a discussion focused on the impact of non-clinical variables on TDI. A cross-sectional, descriptive, and relational study about TDI in deciduous dentition in a children's hospital was performed. A total of 166 patients were included, of which 51.8% were male and 48.2% were female. Subluxation was the most observed injury (37.5%), and high-severity lesions predominated (60.2%). Regarding non-clinical variables, 89.2% of the patients attended urgent care centers within 24 h, and 43.4% within the first 3 h. Pointed objects were the leading cause of TDI (47%). Most TDIs were concentrated between the ages of 2 and 4 (53.5%). Concerning the place of TDI occurrence, the school (41.6%) was associated with faster urgent dental care attendance, and the home (37.3%) was associated with TDI occurrence in children under 2 years of age. Previous TDI experience (24.1% of patients) did not generate differences in the time interval between the TDI and arrival at the hospital, compared with children without a TDI history. While the behavior of clinical variables agrees with the literature reviewed, several non-clinical variables show wide differences. There is a need to identify the non-clinical variables that can significantly interact with phenomena specific to the study population (social, demographic, and cultural). The study of these variables can be useful in applying health policies. In the group studied, the non-clinical data reveals the need to educate parents or guardians on the importance of timely care in TDI, the long-term consequences of traumatism affecting deciduous dentition, and the implication of the maturation of the child's motor skills in TDI.
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- 2023
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13. A new species of Lucilia Robineau-Desvoidy (Diptera, Calliphoridae) from the Amazon region and its potential distribution areas.
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Whitworth TL and Amat E
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- Animals, Calliphoridae, Diptera anatomy & histology, Asteraceae
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Lucilia amazonia, sp. nov. from the Amazon region of Colombia and Brazil is described based on morphology. This species appears to be limited to the Amazon region and is quite distinctive and unlike other Lucilia in the region. A key to the species is provided following the Lucilia key in Whitworth (2014). Based on the distribution observed, its likely distribution is predicted.
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- 2023
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14. Tongue-tie: incidence and outcomes in breastfeeding after lingual frenotomy in 2333 newborns.
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Guinot F, Carranza N, Ferrés-Amat E, Carranza M, and Veloso A
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- Infant, Male, Female, Pregnancy, Infant, Newborn, Humans, Breast Feeding, Incidence, Retrospective Studies, Cross-Sectional Studies, Lingual Frenum surgery, Ankyloglossia epidemiology, Ankyloglossia surgery
- Abstract
Aim: To determine the prevalence of ankyloglossia in newborns with breastfeeding problems and to assess the effectiveness of frenotomy in the maintenance of exclusive breastfeeding at 1 month, 3 months and 6 months in newborns at an Andorran Hospital., Study Design: A descriptive, cross-sectional, population-based, retrospective study of newborns over a 5-year period (2016-2020) was performed. Nine medical history variables (presence or absence of ankyloglossia and type of frenulum, surgical intervention or not, first degree hereditary component, gender, Rh and blood group, type of breastfeeding, causes of cessation and duration of breastfeeding) related to perinatal and feeding history were collected confidentially and anonymously. The Coryllos classification was used for the diagnosis of ankyloglossia. Descriptive analysis of the data, Chi-square test and prevalence ratios were calculated., Results: A total of 2333 newborns were included in the study (50.02% males and 49.98% females). The prevalence of ankyloglossia was 7.84% (n = 183). Of the infants examined, 136 underwent lingual frenotomy. The number of infants who maintained exclusive breastfeeding, both surgically and non-surgically treated, was no statistically significant differences at 1 month ( p = 0.65), 3 months ( p = 0.61) and 6 months ( p = 0.49)., Conclusions: Lingual frenotomy was only performed on patients with ankyloglossia associated with ineffective suction that causes BF difficulties. The realization or not of frenotomy was not a determining factor for the maintenance of breastfeeding at 1 month, 3 months and 6 months. On the contrary, it was a determining factor for the prolongation of mixed feeding. Ankyloglossia related to breastfeeding difficulties should be treated by a multidisciplinary team., Competing Interests: The authors declare no conflict of interest., (©2022 The Author(s). Published by MRE Press.)
- Published
- 2022
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15. Comparison of 0.12% Chlorhexidine and a New Bone Bioactive Liquid, BBL, in Mouthwash for Oral Wound Healing: A Randomized, Double Blind Clinical Human Trial.
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Ferrés-Amat E, Al Madhoun A, Ferrés-Amat E, Carrió N, Barajas M, Al-Madhoun AS, Ferrés-Padró E, Marti C, and Atari M
- Abstract
Following surgery, healing within the oral cavity occurs in a hostile environment, and proper oral care and hygiene are required to accelerate recovery. The aim of the current study is to investigate and compare the bioreactivity characteristics of mouthwashes based on either chlorhexidine (CHX) or a novel bone bioactive liquid (BBL) in terms of oral healing within seven days application post-surgery. A randomized, double blind clinical trial was conducted in 81 patients, wherein the mouthwashes were applied twice a day for a period of 7 days. The visual analog scale (VAS) protocol was applied to determine pain index scores. Early wound healing index (EHI) score was determined for evaluating oral cavity healing progress. No adverse effects were observed using the mouthwashes, but CHX application resulted in stained teeth. Applications of both CHX and BBL were sufficient to reduce pain over a period of 7 days. However, the BBL group demonstrated a statistically significant reduction in VAS scores starting on day 4. The EHI scores were significantly higher in the BBL group compared with the CHX group, independent of tooth location. No differences in either VAS or EHI scores due to gender were observed. Compared with the commercially available CHX mouthwash, application of the BBL mouthwash reduced pain and accelerated oral cavity healing to a greater extent, suggesting it effectively improves the oral cavity microenvironment at the wound site in mediating soft tissue regeneration.
- Published
- 2022
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16. Towards the systematics and diversity of Neotropical Tanytarsus van der Wulp (Diptera: Chironomidae): news from Colombia.
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Dantas GPS, Amat E, Hamada N, and Gika W
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- Animals, Colombia, Ecosystem, Male, Chironomidae
- Abstract
Our study pertains to the systematics and diversity of non-biting midges of the genus Tanytarsus van der Wulp, 1874 from the Neotropical region and in particular, Colombia, a country scarcely studied for these dipterans to date. Adult male specimens collected from the Colombian Llanos and Andes biomes belong to five species described as new in the present paper: Tanytarsus colombiensis sp. nov. (placed in the caipira species group, here defined), T. germani sp. nov. and T. gnomon sp. nov. (both placed in the curvicristatus group, here defined), T. lulu sp. nov. (in the ligulatus group, here defined) and T. meta sp. nov. (the riopreto group). Also an illustrated brief redescription of the adult male of T. hastatus Sublette et Sasa, 1994 is provided. After reclassification of Caladomyia Swedal, 1981, the name accepted as a junior synonym of Tanytarsus, several species names became homonyms, thus they are here proposed to be replaced with substitute names, as follows: Tanytarsus reiffi nom. nov. pro Tanytarsus reissi (Reiff, 2000); Tanytarsus sanseverinoi nom. nov. pro Tanytarsus angelae Trivinho-Strixino et Shimabukuro, 2017; Tanytarsus trivinhostrixinoi nom. nov. pro Tanytarsus fittkaui Sanseverino et Trivinho-Strixino, 2010. Rheotanytarsus breda (Roback, 1960) comb. nov. is excluded from Tanytarsus. An annotated checklist of Neotropical Tanytarsus, with 89 species, is also presented.
- Published
- 2022
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