A new species of Sinocyclocheilus (Cypriniformes, Cyprinidae) from the Beipan-Jiang in Guizhou, China

By

Wang, Leishan
Luo, Qi
Zhang, Renyi

Type

Article

Date of Publication

2025-5-13

Original Publication

ZooKeys

Volume

1238

Pages

99--114

Subjects

cavefish , karst , molecular phylogenetic analysis , Morphology , new record , Sinocyclocheilus zhenningensis , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1238.136371

 

Abstract

Sinocyclocheilus zhenningensissp. nov. from the Dabang-He of the Beipan-Jiang Basin in Zhenning County, Guizhou Province, China, is described based on morphological and molecular evidence. The new species can be distinguished morphologically from all congeners in this genus by: (1) normal eyes (5.8%–8.2% SL), presence of pigmentation, with a humpback and no horn structure; (2) pelvic fin rays ii-8, dorsal-fin rays iii-8, stiff and stout last unbranched ray; (3) body depth normal (26.5%–30.1% SL) and covered with irregular black spots, body scaled, but scales buried beneath the skin; (4) lateral line complete, slightly curved ventrally, 42–47 lateral line pored scales; and (5) pectoral fin short, not reaching the anterior base of pelvic fin. Based on the mitochondrial cytochrome b (Cytb) gene phylogenetic tree, S. zhenningensissp. nov. is strongly supported as sister to the S. cyphotergous-S. multipunctatus subclade. The minimum genetic distance between Sinocyclocheilus zhenningensissp. nov. and its congeneric species is 3.8%.