A new genus and species of freshwater mussel from the Pearl River Basin in Guangxi, China (Bivalvia, Unionidae, Gonideinae)

By

Dai, Yu-Ting
Chen, Zhongguang
Li, Fan
Huang, Xiao-Chen
Ouyang, Shan
Wu, Xiaoping

Type

Article

Date of Publication

2025-04-17

Original Publication

Zoosystematics and evolution

Volume

101

Pages

805--812

Subjects

Biodiversity , molluscs , Phylogeny , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia Pensoft

Identifiers

DOI: https://doi.org/10.3897/zse.101.151802

 

Abstract

A new genus and species of freshwater mussels, Guiunio rarus Chen, Li, Dai & Wu, gen. et sp. nov., is described from the Pearl River Basin in China based on comparative morphology and molecular phylogeny. The new taxon belongs to the tribe Gonideini and can be distinguished from other genera by a unique combination of characteristics: shell medium-sized, moderately thick, flat, long, sub-glossy, opaque; anterior small, rounded and short; posterior extremely expanded, wide and long, with an indistinct obtuse angle in the middle of posterior margin; papillae on flap margin highly degraded. The validity of it is further supported by the molecular phylogenetic analysis based on COI, 16S and 28S sequences.