Glyptothorax pulcher (Siluriformes, Sisoridae), a new species from the upper Pearl River of Yunnan and Guangxi, southwest China

By

Zeng, Yu-Yang
Lin, Feng
Yang, Hongfu
Pu, Xin-Rui
Jiang, Wansheng
Chen, Xiao-Yong

Type

Article

Date of Publication

2026-1-5

Original Publication

Zoosystematics and evolution

Volume

102

Series / Issue

Issue: 1

Pages

17--26

Subjects

COI , cyt b , morphological differentiation , Phylogeny , Tuoniang River

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia Pensoft

Identifiers

DOI: https://doi.org/10.3897/zse.102.167142

 

Abstract

<br> A new species of the genus<br> Glyptothorax<br> ,<br> Glyptothorax pulcher<br> sp. nov.<br> is described from the Tuoniang River, the Pearl River Basin, in south-eastern Yunnan Province and western Guangxi Zhuang Autonomous Region, China. This new species most closely resembles<br> G. quadriocellatus<br> in overall morphology, including similar outline appearance, skin tubercles and colour pattern. It can be distinguished from its congeners that are found in east of the Red River in China by the following combination of characteristics: distinctive colour pattern, skin with sparse soft tubercules, dorsal surface of head smooth, thoracic adhesive apparatus (TAA) broad (length of 1–1.2 times its width, width of TAA 12.0–14.3% SL), adipose-fin base short (11.7–15.4% SL), caudal peduncle deep and short (13.7–17.5% SL in length, 10.3–12.3% SL in depth). Its validity is further confirmed by molecular phylogenetic analysis, based on mitochondrial<br> CO<br> I and Cyt<br> b<br> gene sequences, indicating it forms a sister group with<br> G. pallozonum<br> . The estimated K2P genetic distances between the new species and<br> G. pallozonum<br> range from 5.7% to 6.0%. In addition, phylogenetic evidence also suggests that<br> G. zhujiangensis<br> not be a valid species, but rather a junior synonym of<br> G. pallozonum<br> in this study.<br>