triangulum, Chaetodon Cuvier [G.] (ex Kuhl & van Hasselt) in Cuvier & Valenciennes 1831:44 [Histoire naturelle des poissons v. 7; ref. 4881] Jakarta, Java, Indonesia. Lectotype: RMNH 1135. Paralectotypes: RMNH D487 (1, stuffed). Type catalog: Bauchot 1963:138 [ref. 20718]. Lectotype established in Bauchot 1963:138 [ref. 20718]. •Valid as Chaetodon triangulum Cuvier 1831 -- (Burgess 1978:427 [ref. 700], Allen 1980:160 [ref. 22764], Blum 1989:14 [ref. 37553], Randall et al. 1990:221 [ref. 15987], Chen et al. 1997:124 [ref. 26476], Pyle 2001:3232 [ref. 26117], Allen & Adrim 2003:42 [ref. 26830], Smith et al. 2003:305 [ref. 27125], Manilo & Bogorodsky 2003:S112 [ref. 27377], Randall 2005:310 [ref. 28239], Satapoomin 2009:188 [ref. 30463], Allen & Erdmann 2012:532 [ref. 31980], Fricke et al. 2018:238 [ref. 35805], Psomadakis et al. 2020:512 [ref. 37272], Heemstra & Heemstra 2022:461 [ref. 39746], Allen & Erdmann 2024:565 [ref. 40796]). Current status: Valid as Chaetodon triangulum Cuvier 1831. Chaetodontidae: Chaetodontinae. Distribution: Indian Ocean: East Africa and Madagascar east to Andaman Sea and Java (Indonesia). Habitat: marine.