Formosania is a genus of gastromyzontid loaches native to China and Taiwan.
Distribution Most members of this are endemic to mainland China. Two species, F. lacustris and F. gilberti, are endemic to Taiwan.
Species There are currently 11 species that has been recognized as belonging to this genus. They are listed below: Formosania chenyiyui (C. Y. Zheng, 1991) Formosania davidi (Sauvage, 1878) Formosania fascicauda (Nichols, 1926) Formosania fasciolata (H. G. Wang, Z. Y. Fan & Ying Chen, 2006) Formosania galericula (X. F. Zhang, 2011) Formosania immaculata W. Sun, J.-J. Zhou & J.-Q. Yang, 2023 Formosania lacustris (Steindachner, 1908) Formosania paucisquama (C. Y. Zheng, 1981) Formosania stigmata (Nichols, 1926) Formosania tangi (Chen, Zhou, Chen & Yang, 2026) Formosania tinkhami (Herre, 1934)
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