Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Dec 2002

Otocinclus tapirape: A New Hypoptopomatine Catfish from Central Brazil (Siluriformes: Loricariidae)

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Page Range: 1063 – 1069
DOI: 10.1643/0045-8511(2002)002[1063:OTANHC]2.0.CO;2
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Abstract

A new species of Otocinclus, Otocinclus tapirape, is described. The new taxon differs from other species of the genus by the following combination of characters: low number of trunk lateral plates; canal-bearing plates of trunk median plate series truncated, restricted to the anterior field; presence of iris diverticulum; expanded subnasal lamina on lateral ethmoid; and nuchal plate narrow. The phylogenetic relationships of the new species are ((Otocinclus affinis, Otocinclus flexilis)(Otocinclus xakriaba (Otocinclus tapirape, remaining Otocinclus species))).

Resumen

Uma nova espécie de Otocinclus, Otocinclus tapirape, é descrita. O novo táxon é distinto das outras espécies do gênero pela seguinte combinação de caracteres: número pequeno de placas da série mediana do corpo; placas laterais com canais restritas ao campo anterior do corpo; presença de um divertículo na íris; uma lâmina subnasal expandida no etmóide lateral; e placa nucal estreita. As relações filogenéticas da nova espécie são ((Otocinclus affinis, Otocinclus flexilis)(Otocinclus xakriaba (Otocinclus tapirape, demais espécies de Otocinclus))).

Copyright: The American Society of Ichthyologists and Herpetologists
 Fig. 1. 
 Fig. 1. 

Otocinclus tapirape, new species, holotype, MZUSP 73975, 22.4 mm SL, dorsal, lateral, and ventral views

 Fig. 2. 
 Fig. 2. 

Anterior part of neurocranium of Otocinclus tapirape, new species, paratype, MZUSP 73976. Dorsal view, left side. Odontodes not depicted. Scale bar = 1 mm

 Fig. 3. 
 Fig. 3. 

Dorsal view of nuchal plate and plates anterior to dorsal spine of Otocinclus tapirape, new species, paratype, MZUSP 73976. Scale bar = 1 mm

 Fig. 4. 
 Fig. 4. 

Distribution of Otocinclus tapirape, new species. Type-locality indicated by an asterisk. The other known locality of the new species indicated by the square. Shaded area represents the Ilha do Bananal

 Fig. 5. 
 Fig. 5. 

Consensus tree showing relationships among species of Otocinclus (fundamental trees with length = 48, consistency index = 0.62, retention index = 0.76)

 Fig. 6. 
 Fig. 6. 

Schematic illustration of vertebrae and ribs of Otocinclus tapirape, new species, paratype, MZUSP 73976. Gray areas represent ligaments. Scale bar = 1 mm

Received: 13 Dec 2001
Accepted: 07 Jun 2002
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