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Issue: Vol. 5575 No. 4: 28 Jan. 2025
Type: Article
Published: 2025-01-28
DOI: 10.11646/zootaxa.5575.4.3
Page range: 535-544
Abstract views: 317
PDF downloaded: 7

A new species of catfish, Pterocryptis vorax (Actinopterygii: Siluridae), from northern Borneo

Lee Kong Chian Natural History Museum; National University of Singapore; 2 Conservatory Way; Singapore 117377
Institute for Biodiversity and Environmental Research; Universiti Brunei Darussalam; Jalan Tungku Link Gadong; BE1410; Brunei Darussalam
Lee Kong Chian Natural History Museum; National University of Singapore; 2 Conservatory Drive; Singapore 117377
Pisces Siluriformes Brunei Darussalam Belalong River Temburong River

Abstract

This study describes Pterocryptis vorax, a new species of silurid catfish from the upper reaches of the Temburong River drainage in Brunei Darussalam, northern Borneo. Pterocryptis vorax is distinguished from congeners in having a unique combination of the following characters: rictal lobe ending at vertical posterior to posterior orbital margin, deep lower jaw with a more gently curved anteroventral margin, a color pattern of densely distributed dark brown patches on the flanks that coalesce to form a reticulate pattern, a dark vertical band at the caudal-fin base, 46–57 anal-fin rays and 48–49 vertebrae. Sexual dichromatism in Pterocryptis is also reported for the first time here.

 

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