pachycheilus, Gymnodiptychus Herzenstein [S. M.] 1892:226 [56] [Mélanges Biologiques, tirés du Bulletin physico-mathématique de l'Académie Impériale des Sciences de St. Pétersbourg v. 13 (pt 2); ref. 5037] Huang He River and other localities in central China. Syntypes: ZIN 7281-82 (1, 2), 9423-25 (1, 2, 1), 9440 (1). On p. 56 of Bull. Acad. Imp. Sci. St. Petersbourg (n. s.) v. 3. •Valid as Diptychus pachycheilus (Herzenstein 1892) -- (Tsao 1964:176 [ref. 13501]). •Valid as Gymnodiptychus pachycheilus Herzenstein 1892 -- (Wu & Wu 1992:429 [ref. 21205], Ye & Fu in Ding 1994:392 [ref. 21531], Zhu 1995:92 [ref. 25213], Chen & Huang in Chen 1998:230 [ref. 23556], Chen & Cao et al. in Yue 2000:351 [ref. 25272], Chen & Chen 2001:147 [ref. 25461], Zhang et al. 2016:118 [ref. 34477], Zhang et al. 2019:330 [ref. 36699], Guo 2021:436 [ref. 38617]). Current status: Valid as Gymnodiptychus pachycheilus Herzenstein 1892. Cyprinidae: Schizopygopsinae. Distribution: Yangtze River basin, China. Habitat: freshwater.