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Issue: Vol. 4175 No. 3: 14 Oct. 2016
Type: Article
Published: 2016-10-14
DOI: 10.11646/zootaxa.4175.3.7
Page range: 281–291
Abstract views: 50
PDF downloaded: 2

New species of Curculionichthys (Siluriformes: Loricariidae) from the eastern Guiana Shield

Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, R Prof. Dr. Antonio C. W. Zanin, s/n, Rubião Jr, 18618–689, Botucatu SP, Brazil
Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, R Prof. Dr. Antonio C. W. Zanin, s/n, Rubião Jr, 18618–689, Botucatu SP, Brazil
Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, R Prof. Dr. Antonio C. W. Zanin, s/n, Rubião Jr, 18618–689, Botucatu SP, 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. Antonio C. W. Zanin, s/n, Rubião Jr, 18618–689, Botucatu SP, Brazil
Pisces Amazon basin Cascudinhos Freshwater fishes Otothyrini taxonomy

Abstract

We describe a new species of Curculionichthys from northern Brazil. The new species is known from the rio Cassiporé, an Atlantic coastal river and an unnamed affluent of the rio Jari, left tributary of the Amazon river. It can be distinguished from congeners by (1) the irregular concentration of chromatophores that cover the anal-fin origin and adjacent region, and distal portions of the first unbranched anal-fin ray, (2) lack of dark-brown spots scattered over the body, (3) lack of contrasting dark spots over the anterodorsal region of the body, (4) presence of papillae randomly distributed across the lower lip, (5) small, inconspicuous odontodes that form rows over the head and trunk, (6) anterior profile of the head pointed, (7) higher number of premaxillary and dentary teeth, (8) lack of an unpaired platelet on the dorsal portion of the caudal peduncle, (9) lower number of vertebrae, and (10) higher number of lateral abdomen plates. A discussion on the morphological variation of diagnostic features within Curculionichthys is also provided.

 

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