rhombeus, Carassioides Oshima [M.] 1926:7 [Annotationes Zoologicae Japonenses v. 11 (no. 1); ref. 3314] Kachek River near Kachek, Hainan Island, China. Syntypes: (4, largest described). •Synonym of Carassioides cantonensis (Heincke 1892) -- (Chen & Huang 1977:429 [ref. 8497], Mai 1978:26 [ref. 13511], Kuang in Kuang et al. 1986:141 [ref. 26639], Liu in Pan et al. 1991:227 [ref. 23876], Luo & Yue in Yue 2000:425 [ref. 25272], Zhang et al. 3016:83 [ref. 34477]). •Synonym of Carassioides acuminatus (Richardson 1846) -- (Kottelat 2013:84 [ref. 32989]). Current status: Synonym of Carassioides acuminatus (Richardson 1846). Cyprinidae: Cyprininae. Habitat: freshwater, brackish.