On a new species of Chinapotamon Daiand Naiyanetr, 1994 and the first record of Chinapotamon pusillum (Song, 1984) and Songpotamon malipoense Shi, Pan & Sun, 2023 (Crustacea, Decapoda, Brachyura, Potamidae) from northern Vietnam

By

Do, Van Tu, 1980-
Tan, Zhi Wan
Nguyen, Tong Cuong

Type

Article

Date of Publication

2025-10-15

Original Publication

Zoosystematics and evolution

Volume

101

Series / Issue

Issue: 4

Pages

1995--2012

Subjects

Biodiversity , freshwater crab , Indochina , Potamiscinae , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia Pensoft

Identifiers

DOI: https://doi.org/10.3897/zse.101.166629

 

Abstract

The presence of freshwater crabs of the genus Chinapotamon Dai & Naiyanetr, 1994 (Potamidae) in northern Vietnam was only recently established with the description of C. cf. depressum (Dai, Song, Li & Liang, 1980) from Cao Bang Province, and C. cf. pusillum (Song, 1984) and C. insulare Le, Dang & Do, 2024, from Quang Ninh Province (Le et al. 2024). Re-examination of the specimens referring to the first two species specimens in comparison with the holotypes and original descriptions of C. depressum and C. pusillum, revealed that C. cf. depressum represents a new species, herein named C. halangensesp. nov. While C. cf. pusillum is confirmed to be C. pusillum, a recorda that represents a range extension for the latter species. Chinapotamon halangensesp. nov., can be distinguished from congeners by distinct carapace proportions and clear differences in male gonopod morphology. In addition, we report on the discovery of Songpotamon malipoense Shi, Pan & Sun, 2023, from Ha Giang Province in northern Vietnam. As a result of these recent discoveries, Vietnam’s freshwater crab fauna now comprises 65 recognized species.