Description of a new species of Parotocinclus (Siluriformes, Hypoptopomatinae) from the rio Tapajós basin

[Karsten S.]

Description of a new species of Parotocinclus (Siluriformes, Hypoptopomatinae) from the rio Tapajós basin

Fábio Fernandes Roxo, Gabriel Souza da Costa e Silva, Claudio Oliveira

Abstract
A new species of Parotocinclus is described from three small tributaries of the rio Tapajós basin, Mato Grosso State, Brazil. The new species can be distinguished from its congeners by presenting the following characters:
(1) a triangular dark blotch at the anterior base of the dorsal fin,
(2) the absence of an adipose fin but presence of one small platelet at typical adipose-fin region,
(3) the abdomen completely covered by dermal plates,
(4) a pectoral girdle totally exposed,
(5) a single series of bicuspid teeth, and
(6) the higher number of bicuspid premaxillary and dentary teeth.

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Die neue Art heisst Parotocinclus dani und scheint näher verwandt zu sein mit den kleineren Arten der Longirostris-Gruppe, auch wenn bei der Art die gattungstypische Adipose fehlt.

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Gruß,
Karsten