Cathaica
Chinese Journal of Malacodiversity
贝类多样性研究
贝类多样性研究
A new genus and species of genideine freshwater mussel from Guizhou, China, with notes on a new synonym of Cosmopseudodon resupinatus (von Martens, 1902) (Bivalvia: Unionidae: Gonideinae)
贵州省隆脊蚌亚科一新属新种，兼论稀褶饰拟齿蚌一新异名（双壳纲：蚌科：隆脊蚌亚科）
Zhong-Guang Chen (陈重光)1,3,#,*, Yu-Ting Dai (代雨婷)2,#, Hui Zheng (郑辉)1,4, & Shan Ouyang (欧阳珊)1,5 & Xiao-Ping Wu (吴小平)1,6,*
1 School of Life Sciences, Nanchang University, Nanchang, Jiangxi 330031, China.
[南昌大学生命科学学院 南昌 330031 中国]
2 College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang, Jiangxi 330045, China;
[江西农业大学动物科学技术学院 南昌 330045 中国]
https://orcid.org/0009-0001-5856-3987
3 https://orcid.org/0000-0003-2689-3321; Email: zgchen1002@foxmail.com
4 https://orcid.org/0009-0004-5222-3975
6 https://orcid.org/0009-0004-6973-4800
5 https://orcid.org/0000-0002-8037-5640; Email: xpwu@ncu.edu.cn
（*通讯作者; #共同第一作者）
Published on 25 December 2025 DOI: https://doi.org/10.5281/zenodo.18041389
ZooBank Code: http://zoobank.org/urn:lsid:zoobank.org:pub:E919A276-E65B-46C2-8396-AEB74C6440FF
Abstract: A new genus and species of gonideine freshwater mussel, Tenuiunio accuratus n. gen. & n. sp., is described from the upper Yuanjiang River basin in Guizhou, China. It can be distinguished from all other genera of Gonideini by the irregularly oval and thin shell, and the almost invisible pseudocardinal teeth. The validity of the new genus is further supported by the molecular phylogenetic results based on COI, 16S and 28S sequences. Additionally, based on molecular phylogenetic results, morphological characteristics, and geographic distribution, we consider Cosmopseudodon wenshanensis Wu & Liu, 2024 to be a junior synonym of C. resupinatus (von Martens, 1902).
摘 要：本文描述了产自中国贵州沅江上游的河蚌新属新种：严谨薄壳蚌 Tenuiunio accuratus n. gen. & n. sp.。该属可依据以下特征与所有同族其他属区分：贝壳薄且为不规则的椭圆形；拟主齿几乎不可见。其有效性也被基于COI、16S和28S序列的分子系统发育结果所证实。此外，基于分子系统发育结果、形态学特征和地理分布，我们将文山饰拟齿蚌 Cosmopseudodon wenshanensis Wu & Liu, 2024修订为稀褶饰拟齿蚌 C. resupinatus (von Martens, 1902)的次异名。
Key words. Biodiversity, molecular phylogeny, new taxa, new synonym, taxonomy
关键词：生物多样性，分子系统发育，新阶元，新异名，分类学