Four new species of genus Acmella W.T. Blanford, 1869 (Gastropoda, Assimineidae) from Southern Thailand

By

Seedee, Kunya
Dumrongrojwattana, Pongrat
Poeaim, Supattra

Type

Article

Date of Publication

2025-10-22

Original Publication

ZooKeys

Volume

1256

Pages

275--292

Subjects

Cave-dwelling gastropods , limestone habitat , microsnails

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1256.157322

 

Abstract

<br> This study explores the diversity of microsnails inhabiting limestone caves in Southern Thailand. It describes four new species of the genus<br> Acmella<br> W.T. Blanford, 1869 (Gastropoda, Assimineidae):<br> Acmella krueangensis<br> sp. nov.<br> from Ranong Province,<br> A. thamsingensis<br> sp. nov.<br> and<br> A. changphueakensis<br> sp. nov.<br> from Chumphon Province, and<br> A. kanchanaditensis<br> sp. nov.<br> from Surat Thani Province. These species are distinguished by shell morphology, particularly the number of striae on the last whorl and the protoconch sculpture. Phylogenetic analyses based on mitochondrial cytochrome c oxidase subunit I (<br> COI<br> ) gene sequences further support their distinctiveness and clarify their taxonomic placement. The results enhance the understanding of<br> Acmella<br> diversity in Thailand and shed light on biogeographical patterns found in this genus and the adaptations needed to survive under the conditions of cave systems.<br>