The Catfish Genus Tetranematichthys (auchenipteridae)

The neotropical auchenipterid catfish genus Tetranematichthys is reviewed. Tetranematichthys was previously thought to be monotypic with its single species, T. quadrifilis, reported to have a broad range encompassing major portions of the Amazon basin and southern tributaries of the Río Orinoco. Tet...

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Bibliographic Details
Published in:Copeia 2006-05, Vol.2006 (2), p.168-180
Main Authors: Vari, Richard P, Ferraris, Carl J
Format: Article
Language:English
Subjects:
Auchenipteridae
Body regions
Catfish
Colors
CONTENTS
Fish
Freshwater
Freshwater fishes
Head
Holotypes
Male animals
New species
Pigmentation
Spine
Taxonomy
Water
Zoology
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Description
Summary:The neotropical auchenipterid catfish genus Tetranematichthys is reviewed. Tetranematichthys was previously thought to be monotypic with its single species, T. quadrifilis, reported to have a broad range encompassing major portions of the Amazon basin and southern tributaries of the Río Orinoco. Tetranematichthys quadrifilis was rather found to be endemic to the Rio Guaporé in the southwestern portions of the Amazon basin and a new species of the genus is described from material originating in the upper Rio Negro system in Brazil and Venezuela and the upper Río Orinoco basin in southern Venezuela. The new species is also apparently widespread within the Amazon basin and the southern and north-central portions of the Río Orinoco system. The species of Tetranematichthys have distinctive modifications of the mandibular barbel and associated systems, which are proposed as synapomorphic for the species of the genus and that potentially function as a fishing lure.
ISSN:0045-8511
2766-1512
1938-5110
2766-1520
DOI:10.1643/0045-8511(2006)6[168:TCGTA]2.0.CO;2