A revision of Bithyniidae (Mollusca, Gastropoda) from the Inle Lake Basin, Myanmar

By

Zhang, Lejia
Shu, Shu-sen
Song, Xin-Yuan
Naing, Nay Htet
Oo, Thaung Naing
Chen, Xiao-Yong

Type

Article

Date of Publication

2025-3-24

Original Publication

Zoosystematics and evolution

Volume

101

Series / Issue

Issue: 2

Pages

643--660

Subjects

ancient lake , bithyniid snail , Phylogeny , radula , Shan State , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia Pensoft

Identifiers

DOI: https://doi.org/10.3897/zse.101.143936

 

Abstract

Inle Lake, located on the Shan Plateau of Myanmar, is the only ancient lake on the Indochinese Peninsula and a biodiversity hotspot of freshwater fauna with high diversity and endemism, including molluscs. However, recent research on its biodiversity remains limited. Based on morphological, anatomical, and molecular studies, we systematically revise the freshwater snails of the family Bithyniidae from the Inle Lake basin. We provide an updated re-description of four bithyniid species within three genera from the Inle Lake basin, including one new record, Digoniostoma iravadicacomb. nov. The endemic genus Parabithyniasyn. nov. with one endemic species of Inle Lake, Hydrobioides physcuscomb. rev., is considered a synonym of Hydrobioides. Gabbia nanacomb. nov. is assigned to Gabbia based on shell morphology and molecular phylogeny. Hydrobioides dautzenbergistat. rev. from Thailand is recognised as a valid species rather than a synonym of Hydrobioides nassa, which is endemic to Shan State of Myanmar. There are altogether seven bithyniid species recorded from the Inle Lake basin and surrounding area, including four endemic species.