marginatus, Acara Heckel [J. J.] 1840:350 [Annalen des Wiener Museums der Naturgeschichte v. 2; ref. 2064] Cuiabá, Mato Grosso State, Brazil. Holotype (unique): NMW 33673. •Synonym of Cichlasoma dimerus (Heckel 1840) -- (Kullander 1983:193 [ref. 8319], Kullander in Reis et al. 2003:622 [ref. 27061], Litz & Koerber 2014:33 [ref. 33622], Mirande & Koerber 2015:56 [ref. 35117], Koerber et al. 2017:77 [ref. 35267], Hablützel & Huanto 2020:52 [ref. 37939]). Current status: Synonym of Cichlasoma dimerus (Heckel 1840). Cichlidae: Cichlinae. Habitat: freshwater.