Open AccessA taxonomic review of Trapezidens (Bivalvia: Unionidae: Lamellidentini), a freshwater mussel genus endemic to Myanmar, with a description of a new species
Author(s) -
Ekaterina S. Konopleva,
Ivan N. Bolotov,
Alexander V. Kondakov,
Oleg D. Koov,
Mikhail Y. Gofarov,
Alena A. Tomilova,
Zau Lunn,
Nyein Chan,
Than Win,
Ilya V. Vikhrev
Publication year - 2020
Publication title -
ecologica montenegrina
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.534
H-Index - 10
eISSN - 2337-0173
pISSN - 2336-9744
DOI - 10.37828/em.2020.27.6
Subject(s) - unionidae , bivalvia , biology , genus , mussel , ecology , zoology , mollusca
Trapezidens Bolotov, Vikhrev & Konopleva, 2017 (Bivalvia: Unionidae: Lamellidentini) is a peculiar freshwater mussel genus, the range of which is confined to the Western Indochina Subregion (Myanmar). Here we show that this genus contains five allopatric species: Trapezidens angustior (Hanley & Theobald, 1876) from the Bago, Sittaung, and Bilin rivers; T. dolichorhynchus (Tapparone-Canefri, 1889) from the Ayeyarwady River; T. exolescens (Gould, 1843) from the Dawei River; T. scutum (Sowerby, 1868) from the Tanintharyi (Great Tenasserim) River; and T. yeti sp. nov. from the Ye River. Phylogenetically, Trapezidens angustior, T. dolichorhynchus, and T. yeti sp. nov. are closely related to each other, forming a species complex, while T. exolescens and T. scutum represent the most distant lineages within the genus. An updated synonymy for each species is compiled.