madagaskariensis, Chaetodon chrysurus Ahl [E.] 1923:163 [Archiv für Naturgeschichte Berlin (N.F.) v. 89 Abt. A, Heft 5; ref. 5113] Mauritius, Mascarenes, southwestern Indian Ocean [not Madagascar]. Holotype (unique): MNHN 0000-9672. Usually seen as madagascariensis but probably should not be emended; authors however may wish to evoke a prevailing usage argument. Based on description of Choetodon (Tetragonoptrus) miliaris (non Quoy & Gaimard 1825) by Sauvage 1891:259 [ref. 14503], allegedly from Madagascar, but in fact from Mauritius based on Chaetodon chrysurus Desjardins 1834. Types mentioned: Paepke 1995:96 [ref. 21847] as madagascariensis. •Synonym of Chaetodon mertensii Cuvier 1831 -- (Randall 2005:316 [ref. 28239]). •Valid as Chaetodon madagaskariensis Ahl 1923 -- (Burgess 1978:398 [ref. 700], Allen 1980:161 [ref. 22764], Heemstra 1986:629 [ref. 5660], Blum 1989:14 [ref. 37553] as madagascariensi, Winterbottom et al. 1989:42 [ref. 13251] as madagascariensis, Chen et al. 1997:119 [ref. 26476] as madagascariensis, Myers 1999:164 [ref. 23965], Fricke 1999:333 [ref. 24106], Allen 2000:89 [ref. 37268], Allen & Adrim 2003:42 [ref. 26830], Smith et al. 2003:304 [ref. 27125] as madagascariensis, Heemstra et al. 2004:3323 [ref. 27945], Heemstra & Heemstra 2004:290 [ref. 28072], Fricke et al. 2009:72 [ref. 30213], Allen & Erdmann 2012:525 [ref. 31980], Fricke et al. 2013:262 [ref. 32706], Fricke et al. 2018:237 [ref. 35805], Dalleau-Coudert et al. 2019:155 [ref. 40104], Durville et al. 2021:313 [ref. 38802], Heemstra & Heemstra 2022:455 [ref. 39746]). Current status: Valid as Chaetodon madagaskariensis Ahl 1923. Chaetodontidae: Chaetodontinae. Distribution: Indian Ocean: Eastern Cape, KwaZulu-Natal (South Africa), East Africa, Seychelles, Comoros, Mozambique Channel, Madagascar and Mascarenes (La Réunion, Mauritius, Rodrigues) east to Andaman Sea, Cocos-Keeling Islands and Christmas Island (Australia). Habitat: marine.