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Morphological diversity and taxonomic revision of monotypic genus Paratrygon Duméril, 1865 (Chondrichthyes: Myliobatiformes: Potamotrygonidae): a complex of species.

Grant number: 11/23420-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2012
Effective date (End): January 01, 2016
Field of knowledge:Biological Sciences - Zoology - Taxonomy of Recent Groups
Principal researcher:Marcelo Rodrigues de Carvalho
Grantee:Thiago Silva Loboda
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):14/03277-6 - Morphological diversity and taxonomic revision of the monotypic genus Paratrygon Dumeril, 1865 (Chondrichthyes: Myliobatiformes: Potamotrygonidae), BE.EP.DR


It is proposed in this paper realize the taxonomic revision of the monotypic genus Paratrygon Duméril, 1865 through morphological analysis of specimens distributed throughout its range, now known to the Amazon and Orinoco basins. His species, Paratrygon aiereba (Müller & Henle, 1841), has a wide geographical distribution and populations distributed along this stretch have morphological differences, most evident in their coloration patterns of dorsal disc and morphology and distribution of dermal denticles. Through a preliminary analysis from the first specimens available (around 70 copies) in the Museu de Zoologia of USP (MZUSP) and the Instituto de Biociências (IBUSP) it was possible to distinguish, with observations on the characters specified above, two new probable species to gender, one from the upper sub-basin of the Araguaia and one of the upper Rio Tocantins. Even populations of P. aiereba from Amazonian rivers close to each other present a considerable diversity of coloration. Thus, this project aims to test the possible morphological separation of populations of P. aiereba found with molecular analysis. As the genus is little known to the morphological point of view, we propose a detailed anatomical review that may provide support for the taxonomic revision of Paratrygon. Thus, new morphological, taxonomic, geographic and phylogenetic date be raised about the evolution of this genus.

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Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CAPRETZ BATISTA DA SILVA, JOAO PAULO; LOBODA, THIAGO SILVA. Potamotrygon marquesi, a new species of neotropical freshwater stingray (Potamotrygonidae) from the Brazilian Amazon Basin. Journal of Fish Biology, v. 95, n. 2, p. 594-612, . (11/23420-0)
DE MOREIRA, RENAN A.; LOBODA, THIAGO S.; DE CARVALHO, MARCELO R.. Comparative anatomy of the clasper of the subfamily Potamotrygoninae (Chondrichthyes: Myliobatiformes). Journal of Morphology, v. 279, n. 5, p. 598-608, . (11/23420-0, 14/03277-6, 13/12434-5)
LOBODA, THIAGO SILVA; LASSO, CARLOS A.; ROSA, RICARDO DE SOUZA; DE CARVALHO, MARCELO RODRIGUES. Two new species of freshwater stingrays of the genus Paratrygon (Chondrichthyes: Potamotrygonidae) from the Orinoco basin, with comments on the taxonomy of Paratrygon aiereba. Neotropical Ichthyology, v. 19, n. 2, . (11/23420-0, 14/03277-6)
CAPRETZ BATISTA DA SILVA, JOAO PAULO; ROSA, RICARDO DE SOUZA; LOBODA, THIAGO SILVA; LASSO, CARLOS ANDRES. Taxonomy needs rigor: a response to Roberts' (2020). Zootaxa, v. 5052, n. 4, p. 597-600, . (14/03277-6, 11/23420-0)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
LOBODA, Thiago Silva. Taxonomic and morphological revision of the genus Paratrygon Duméril (1865) (Chondrichthyes: Myliobatiformes: Potamotrygonidae). 2016. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) São Paulo.

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