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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Potamotrygon marquesi, a new species of neotropical freshwater stingray (Potamotrygonidae) from the Brazilian Amazon Basin

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Capretz Batista da Silva, Joao Paulo [1] ; Loboda, Thiago Silva [1, 2]
Total Authors: 2
[1] Univ Sao Paulo, Inst Biociencias, Dept Zool, Lab Ictiol, Rua Matao, Trav 14, n101, BR-05508090 Sao Paulo - Brazil
[2] Univ Sao Paulo, Lab Paleontol, Dept Biol, Fac Filosofia Ciencias & Letras Ribeirao Preto, Ribeirao Preto - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Fish Biology; v. 95, n. 2, p. 594-612, AUG 2019.
Web of Science Citations: 2

Potamotrygon marquesi, sp. nov., is described and compared with other species of Potamotrygon occurring in the Amazon Basin. The identity of this new species is supported by an extensive external and internal morphological study including coloration pattern, squamation, skeleton and ventral lateral-line canals. Morphometrics and meristics were used to further distinguish P. marquesi from congeners. Potamotrygon marquesi was first considered to fall within the range of variation found in P. motoro. However, even with an extensive variation in coloration observed in P. motoro, this new species presents a series of autapomorphies that confidently distinguishes it from what is understood as the morphological variation found in P. motoro. Additional morphological characters that diagnose P. marquesi include three angular cartilages, asymmetrical star-shaped denticles, a single regular row of spines on tail dorsum, lateral row of caudal spines near the sting insertion, dorsal disc background in beige and grey mixed with shades of grey and bearing open and closed bicolored rings, among others. Although presenting a gap of distribution along the west-east extension of the Amazon Basin, its diagnostic charactistics are consistent in both recorded regions. Our study supports the need for many morphological characters to robustly distinguish members of Potamotrygoninae considering their extremely variable dorsal disc color pattern. (AU)

FAPESP's process: 11/23420-0 - Morphological diversity and taxonomic revision of monotypic genus Paratrygon Duméril, 1865 (Chondrichthyes: Myliobatiformes: Potamotrygonidae): a complex of species.
Grantee:Thiago Silva Loboda
Support type: Scholarships in Brazil - Doctorate