Northern Arctic Federal University, Arkhangelsk, Russia.
N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Arkhangelsk, Russia.
Sci Rep. 2021 May 10;11(1):8244. doi: 10.1038/s41598-021-87633-w.
The Mekong and Chao Phraya rivers harbor a species-rich freshwater mussel assemblage containing a large radiation of the Pseudodontini species. Members of the genera Bineurus Simpson 1900 and Thaiconcha Bolotov et al., 2020 primarily inhabit small and medium-sized tributaries of these rivers. Here, we present an integrative taxonomic review of these genus-level clades. We show that Bineurus contains four species: B. mouhotii (Lea, 1863), B. exilis (Morelet, 1866) stat. rev., B. anodontinum (Rochebrune, 1882) stat. rev., and B. loeiensis sp. nov. In its turn, Thaiconcha comprises three species: T. callifera (Martens, 1860), T. munelliptica sp. nov., and T. thaiensis sp. nov. Two species, Pseudodon ovalis Morlet, 1889 and P. thomsoni Morlet, 1884, are considered here as questionable taxa. These findings further highlight that Southeast Asia represents a significant evolutionary hotspot of freshwater mussels, which requires further international collaborative research and conservation efforts.
湄公河和昭披耶河流域拥有丰富多样的淡水贻贝组合，其中包含大量拟齿蛤属（Pseudodontini）物种的辐射演化。双壳贝属（Bineurus）和泰康贝属（Thaiconcha）的成员主要栖息在这些河流的中小支流中。在这里，我们对这些属级类群进行了综合分类学研究。结果表明，双壳贝属包含四个物种：B. mouhotii（Lea，1863）、B. exilis（Morelet，1866） stat. rev.、B. anodontinum（Rochebrune，1882） stat. rev. 和 B. loeiensis sp. nov.。而泰康贝属则包含三个物种：T. callifera（Martens，1860）、T. munelliptica sp. nov. 和 T. thaiensis sp. nov.。两种物种，拟齿蛤（Pseudodon ovalis）和泰国拟齿蛤（P. thomsoni）被认为是有问题的分类单元。这些发现进一步强调了东南亚是淡水贻贝的重要进化热点，需要进一步开展国际合作研究和保护工作。
