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A new species of spiny driftwood catfish Spinipterus (Siluriformes: Auchenipteridae) from the Amazon basin.

Research paper by Marcelo M Rocha, Felipe F Rossoni, Alberto A Akama, Jansen J Zuanon

Indexed on: 24 Nov '19Published on: 23 Nov '19Published in: Journal of Fish Biology



Abstract

An expedition to the middle Río Purus basin uncovered a remarkable new species of the genus Spinipterus. The new species has a very distinct and conspicuous colour pattern resembling a jaguar and it is almost four times larger than Spinipterus acsi, a small specimen (32 mm L ) from Caño Santa Rita, a right bank tributary of Río Nanay in Peru and a second specimen was reported from Río Juruá, Amazonas State, Brazil. Although the new species is more similar in size and colour pattern to Liosomadoras, it shares the synapomorphies for Spinipterus. The new species differs from the congener by the following characters: (1) colour pattern with large black rosette-like spots over a light yellow to brown background (v. brown background with small dark blotches over the body); (2) adult body size reaching 104.5 mm L (v. maximum known size 37.1 mm L ); (3) posterior process of cleithrum short, never reaching vertical through the dorsal-fin origin (v. posterior process long, surpassing vertical through the dorsal-fin origin); (4) seven soft pectoral-fin rays (v. six); (5) caudal fin truncated (v. caudal fin rounded). This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.