extremus, Platypharodon Herzenstein [S. M.] 1891:229, Pl. 22 (fig. 2) [Zoologischer Theil, St. Petersburg v. 3 (abt. 2)(3); ref. 4917] Huang He River, Qinghai Province, China, elevation 13600 feet. Holotype (unique): ZIN 7325. •Valid as Platypharodon extremus Herzenstein 1891 -- (Tsao 1964:192 [ref. 13501], Wu & Wu 1992:513 [ref. 21205], Ye & Fu in Ding 1994:408 [ref. 21531], Zhu 1995:95 [ref. 25213], Chen & Huang in Chen 1998:244 [ref. 23556], Yue & Chen 1998:163 [ref. 26415], Chen & Cao et al. in Yue 2000:387 [ref. 25272], Su et al. 2012:29 [ref. 31869], Zhang et al. 2016:119 [ref. 34477], Guo 2021:463 [ref. 38617]). •Valid as Schizopygopsis extrema (Herzenstein 1891) -- (Tang et al. 2019:13 [ref. 36511]). Current status: Valid as Schizopygopsis extrema (Herzenstein 1891). Cyprinidae: Schizopygopsinae. Distribution: Huang He River drainage, upper Yangtze River basin, Qinghai Tibetan Plateau, China. Habitat: freshwater.