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Issue: Vol. 5447 No. 3: 7 May 2024
Type: Article
Published: 2024-05-07
DOI: 10.11646/zootaxa.5447.3.8
Page range: 424-432
Abstract views: 806
PDF downloaded: 0

Exostoma sentiyonoae, a new catfish (Teleostei: Sisoridae) from Nagaland, Northeastern, India

Zoological Survey of India (ZSI); M Block; New Alipore; Kolkata; 700 053; India
Kohima Science College; Jotsoma; Nagaland; 797 002; India
Pisces Dzuleke River Barak drainage Indo-Burma Glyptosternine catfish

Abstract

Exostoma sentiyonoae, a new species of glyptosternine catfish is described from the Dzuleke River, a tributary of the Barak River in Nagaland, northeastern India. This is the fourth species of Exostoma described from the Barak drainage. The new species can be distinguished from congeners by the adipose fin adnate to the upper procurrent caudal-fin rays, presence of tubercles on dorsal-fin spine, anterolateral surfaces of lip with parallel and rounded striae, slender head 7.7–13.1% SL, long dorsal-adipose distance 16.8–24.6% SL, small eye 5.1–8.8 % HL, and 41 vertebrae. Two species groups within the genus Exostoma are proposed; Group I, in which the adipose fin is confluent with the upper procurrent caudal-fin rays, and Group II in which adipose fin is separate from the upper procurrent caudal-fin rays.

 

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