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DOI: http://dx.doi.org/10.11646/zootaxa.4586.3.2

Systematics, biogeography and conservation of Paragenidens grandoculis n. gen. and n. comb. (Siluriformes; Ariidae), a critically endangered species from southeastern Brazil

ALEXANDRE PIRES MARCENIUK, LEONARDO FERREIRA DA SILVA INGENITO, FLÁVIO CÉSAR THADEO LIMA, JOÃO LUIZ ROSETTI GASPARINI, CLAUDIO OLIVEIRA

Abstract


Paragenidens, a new genus of ariid catfishes is proposed to accommodate Arius grandoculis, a species previously assigned to the genus Potamarius. Paragenidens grandoculis is an endemic ariid catfish categorized as Critically Endangered and probably Extinct from coastal lacustrine systems from Espírito Santo and Rio de Janeiro states, southeastern Brazil. After more than 50 years without records of the species, new recent fieldwork revealed that the species is extinct at lagoa Juparanã, but still can be found at lagoa Nova in Linhares municipality, Espírito Santo state. Here, Paragenidens is described based on morphological and molecular evidence. In addition to its generic reassignment, the species is redescribed, and comments on its phylogenetic relationships, biogeography and conservation are presented.

 


Keywords


Reptilia, Threatened species, endemic, phylogenetic relationships, conservation, Atlantic rainforest, Paragenidens gen. n.

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ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand
A founding journal of Biotaxa