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Issue: Vol. 5512 No. 2: 19 Sept. 2024
Type: Article
Published: 2024-09-19
DOI: 10.11646/zootaxa.5512.2.2
Page range: 166-184
Abstract views: 269
PDF downloaded: 149

A new species within the Enteromius kerstenii complex (Actinopterygii, Cyprinidae, Smiliogastrinae) from south-western Ethiopia

Institute of Vertebrate Biology; Czech Academy of Sciences; Květná 8; 60365 Brno; Czech Republic; Natural History Museum Vienna; Burgring 7; A-1010 Vienna; Austria
Natural History Museum Vienna; Burgring 7; A-1010 Vienna; Austria
EIAR-National Fisheries and Aquatic Life Research Center; P.O. Box 64; Sebeta; Ethiopia
Department of Life Sciences; Natural History Museum; Cromwell Road; London; SW7 5BD; United Kingdom
Department of Zoological Sciences; Addis Ababa University; PO Box 1176; Addis Ababa; Ethiopia
Pisces Africa conservation endemism freshwater fish taxonomy wetlands

Abstract

A new species of small-sized smiliogastrin barb, Enteromius gamo sp. nov., is described from tributaries to lakes Abaya and Chamo in south-western Ethiopia. The new species belongs to a readily diagnosable group commonly identified as E. kerstenii, exhibiting a thickened and serrated last unbranched ray in the dorsal fin, a low number of scales in the lateral series (≤ 27), and a yellow, orange or reddish blotch on operculum. Pairwise genetic distances between the new species from Ethiopia and specimens of E. kerstenii from close to the type locality in north-eastern Tanzania were 7.5–8.3 % (COI) and 8.9–10.1 % (cytb). Enteromius gamo sp. nov. is morphologically distinguished from E. kerstenii and all examined congeners from Tanzania, Kenya, and Uganda primarily by short anterior (15.8–35.1 %, mean 27.4 %, of snout length) and posterior (63.2–95.7 %, mean 81.0 %, of snout length) barbels. The new species is known only from wetlands and side channels of rivers (Hare, Sile, and Sago) along the western shores of lakes Abaya and Chamo.

 

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