Revision of two species of Sinopotamon Bott, 1967 (Crustacea, Brachyura, Potamidae) endemic to China: a new combination and a new synonym.

The systematics of two problematic potamid species, Sinopotamonkoatenense (Rathbun, 1904) and Sinopotamonwuyiensis Li, Lin, Cheng & Tang, 1985, both originally described from the Wuyi Mountains are resolved in this study. Sinopotamonkoatenense is transferred to the genus Huananpotamon Dai & Ng, 1994, as the new combination Huananpotamonkoatenense comb. nov. The new combination differs from its congeners in the form of the carapace, male pleon, male first gonopod, and vulvae. Phylogenetic analyses based on mitochondrial 16S rDNA sequences support the identification of Huananpotamonkoatenense comb. nov. and a redescription is also provided. In addition, S.wuyiensis is confirmed as a junior synonym of Sinopotamonfukienense Dai & Chen, 1979 based on morphological similarities and phylogenetic lineages.