quadrifasciatus, Chaetodon Sevastianoff [A.] 1809:448, Pl. 18 (lower) [Mémoires de l'Académie Impériale des Sciences de St. Pétersbourg (5. Série) v. 1 (1803-1806); ref. 22008] No types known. Objectively invalid; preoccupied by Chaetodon quadrifasciatus Bloch & Schneider 1801; not replaced. •Incorrectly treated as valid -- (Roberts 1978:55 [ref. 8886] in genus Datnioides, Roberts 1989:165 [ref. 6439], Allen 1991:138 [ref. 21090], Talwar & Jhingran 1991:837 [ref. 20764], Kottelat et al. 1993:114 [ref. 23448], Roberts & Kottelat 1994:259 [ref. 21569], Kottelat & Lim 1996:246 [ref. 23210], Rainboth 1996:186 [ref. 22772], Carpenter 2001:2945 [ref. 26101] with author as Sevastianof, Ataur Rahman 2003:351 [ref. 31338], Parenti & Lim 2005:193 [ref. 28285] with author as Sevestianof). •The valid species would be Coius polota Hamilton 1822, from Roberts' and Kottelat's 1994 synonymy, and Datnioides polota (Hamilton 1822) based on Kottelat 2000:92 [ref. 25865]. •Synonym of Datnioides polata (Hamilton 1822) -- (Allen et al. 2008:119 [ref. 30265], Kottelat 2013:344 [ref. 32989]) 1°Homonym. Current status: Synonym of Datnioides polota (Hamilton 1822). Lobotidae. Habitat: freshwater, brackish.