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. 2021 May 10;11:8244. doi: 10.1038/s41598-021-87633-w

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Shells of Bineurus species from the Mekong basin. (A) B. mouhotii (Lea, 1863) [holotype USNM 86339]; (B) B. mouhotii [RMBH biv182_19, Nam Long River, Nam Ou basin, Mekong, Laos]; (C) B. exilis (Morelet, 1866) stat. rev. [lectotype NHMUK 1893.2.4.1981]; (D) B. exilis stat. rev. [topotype UF 507440 (ICH-00610), tributary of Tonle Sap River, Mekong River basin, Cambodia]; (E) Pseudodon pierrei Rochebrune, 1882 syn. nov. [syntype MNHN-IM-2000-1760] (= B. exilis); (F) B. anodontinum (Rochebrune, 1882) stat. rev. [syntype MNHN-IM-2000-1638]; (G) B. anodontinum stat. rev. [topotype UF 507419 (ICH-00553), Mekong River basin, Sambour, Cambodia]; (H) B. loeiensis sp. nov. [holotype RMBH biv119_1, Loei River, Thailand]. Scale bar = 1 cm. Photos: Ilya V. Vikhrev [A]; Ekaterina S. Konopleva [B, H]; Kevin Webb (NHMUK Photographic Unit) [C]; Manuel Caballer (ANR-11-INBS-0004; 2018 MNHN Project “RECOLNAT”) [E, F]; and John M. Pfeiffer [D, G].