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Issue: Vol. 4232 No. 2: 16 Feb. 2017
Type: Article
Published: 2017-02-15
DOI: 10.11646/zootaxa.4232.2.9
Page range: 260–270
Abstract views: 64
PDF downloaded: 1

New species of Parotocinclus (Siluriformes: Loricariidae) from coastal drainages of Rio de Janeiro, southeastern Brazil

Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, R. Prof. Dr. Antônio C. W. Zanin s/n, Rubião Jr, 18618–689, Botucatu, São Paulo, Brazil.
Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, R. Prof. Dr. Antônio C. W. Zanin s/n, Rubião Jr, 18618–689, Botucatu, São Paulo, Brazil. Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington DC, USA
Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, R. Prof. Dr. Antônio C. W. Zanin s/n, Rubião Jr, 18618–689, Botucatu, São Paulo, Brazil. Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington DC, USA
Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, R. Prof. Dr. Antônio C. W. Zanin s/n, Rubião Jr, 18618–689, Botucatu, São Paulo, Brazil. Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington DC, USA
Pisces biodiversity freshwater fishes Neotropical Otothyrini taxonomy

Abstract

A new species of Parotocinclus is described from tributaries of rio São João, an Atlantic coastal river of Rio de Janeiro, southeastern Brazil. The new species is distinguished from its congeners by the possession of a triangular patch of dark pigmentation on the anterior portion of the dorsal-fin base, a fully developed adipose fin, complete exposure of the ventral surface of the pectoral girdle, and a distinctive pigmentation pattern of the caudal fin. The caudal fin has a hyaline background with a large black blotch covering its anterior portion, tapering irregularly through distal portions of the ventral lobe with a hyaline rounded area, and a small patch of dark pigmentation on distal portions of the dorsal lobe.

 

 

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