thayeri, Geophagus Steindachner [F.] 1875:108 [48], Pl. 3 (fig. 2, 2a-2b) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 71 (1. Abth.); ref. 4220] Amazon River at: Tefé, Villa Bella, Obidos, Cudajas; Rio Tocantins; Jatuarana; Ueranduba; Serpa; Rio Tapajos; Brazil. Syntypes: (many) NMW 9249-54 (1, 1, 1, 1, 1, 1), 17046-48 (3), 17050 (2), 17052-56 (1 ea.), 17058-60 (1, 1, 1), 17061-64 (1, 1, 1), 17065-70 (1 ea.), 17101-02 (2), 17103-10 (1 ea.), 17119-25 (1 ea.), 24133-38 (6), 82245 (6). On p. 48 of separate. Additional type localities: R. Negro; R. Trobetes; R. Xingu; Lake Hyanuary; Lake Jose Assu; Lake Saraca; Lake Alexo; Lake Maximo, Brazil. •Synonym of Acarichthys heckelii (Müller & Troschel 1849) -- (Kullander 1986:134 [ref. 12439], Kullander in Reis et al. 2003:607 [ref. 27061], Lucinda et al. 2010:42 [ref. 30771]). Current status: Synonym of Acarichthys heckelii (Müller & Troschel 1849). Cichlidae: Cichlinae. Habitat: freshwater.