Tuesday, May 9, 2023

[Mollusca • 2023] Chamberlainia somsakpanhai • Discovery of A New Endangered Freshwater Mussel Species in the Genus Chamberlainia Simpson, 1900 (Bivalvia: Unionidae) from Mekong Basin

 

Chamberlainia somsakpanhai 
Kongim, Sutcharit & Jeratthitikul, 2023

Tropical Natural History. Supplement 7 

Abstract
Chamberlainia somsakpanhai sp. nov., the largest freshwater bivalve (Unionidae) in the Mekong Basin, is described using morphological characters and molecular analysis. The new species differs from its congeners by having an ovate shell outline and obtuse and distinct sub-biangulate posterior margin. A multi-locus phylogenetic tree (mitochondrial COI and 16S, and nuclear 28S genes) recognized the new species along with other two members of genus, namely C. hainesiana and C. duclerci. Average genetic divergence between the new species and its congeners is 13.8–14.1% by an uncorrected COI p-distance.

Keywords: conservation, endangered, pearl mussel, endemic, Thailand, Indochina

Holotype of Chamberlainia somsakpanhai sp. nov.


Chamberlainia somsakpanhai sp. nov.

 
Bangon Kongim, Chirasak Sutcharit and Ekgachai Jeratthitikul. 2023. Discovery of A New Endangered Freshwater Mussel Species in the Genus Chamberlainia Simpson, 1900 (Bivalvia: Unionidae) from Mekong Basin. Tropical Natural History. Supplement 7;242-250.