heckelii, Acara Müller [J.] & Troschel [F. H.] 1849:624 [Reisen in Britisch-Guiana; ref. 3072] Guyana. No types known. Type catalog: Kullander 1986:138 [ref. 12439]. •Valid as Acarichthys heckelii (Müller & Troschel 1849) -- (Kullander 1986:134 [ref. 12439], Ortega & Vari 1986:20 [ref. 9708], Kullander in Reis et al. 2003:607 [ref. 27061], Kottelat 2013:373 [ref. 32989], DoNascimiento et al. 2017:96 [ref. 35633], Silvano et al. 2020:324 [ref. 38134], Meza-Vargas et al. 2021:27 [ref. 39298]). Current status: Valid as Acarichthys heckelii (Müller & Troschel 1849). Cichlidae: Cichlinae. Distribution: South America: Amazon and Essequibo River basins (Brazil, Colombia, Guyana and Peru). Introduced in Singapore. Habitat: freshwater.