Multi-locus Phylogeny Reveals a New Freshwater Mussel in the Genus Bineurus Simpson, 1900 (Unionidae: Pseudodontini) from Thailand


  • Ekgachai Jeratthitikul Animal Systematics and Molecular Ecology Laboratory, Department of Biology, Faculty of Science, Mahidol University, Bangkok 10400, THAILAND
  • Chirasak Sutcharit Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, THAILAND


freshwater mussels, Indochina, multi-locus phylogeny, new species, Unionida


A new freshwater mussel species is described here as Bineurus panhai sp. nov. Morphological investigation and multi-locus phylogeny based on concatenated data of COI, 16S, and 28S gene sequences reveal that the new species is similar to the Bineurus exilis (Morelet, 1866), but it can be distinguished from the latter taxon by having a curved dorsal margin and a lower posterior end (vs. straight dorsal margin and higher posterior end). They also differ from each other by 2.32% of uncorrected COI p-distance. Bineurus panhai sp. nov. is distributed in the Bang Pakong Basin of eastern Thailand and in headwater tributaries of the Tonle Sap Basin in Thailand and Cambodia. Because of its restricted range, this new species may represent a rare endemic lineage and, hence, is a valuable target for conservation.


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How to Cite

Jeratthitikul, E. and Sutcharit, C. 2023. Multi-locus Phylogeny Reveals a New Freshwater Mussel in the Genus Bineurus Simpson, 1900 (Unionidae: Pseudodontini) from Thailand. Tropical Natural History. 7 (May 2023), 173–180.