elongatus, Chromichthys Guichenot [A.] in Duméril 1861:257, Pl. 22 (fig. 3) [Archives du Muséum d'Histoire Naturelle, Paris v. 10 [for 1858]; ref. 1149] Gabon. Holotype (unique): MNHN A-1111. Type catalog: Blanc 1962:204 [ref. 20868]. •Valid as Hemichromis elongatus (Guichenot 1861) -- (Daget & Teugels 1991:189 [ref. 20957], Skelton 1993:294 [ref. 24071], Fuller et al. 1999:431 [ref. 25838], Skelton 2001:294 [ref. 27406], Mundy 2005:420 [ref. 28379], Stiassny et al. 2007:341 [ref. 30045], Marshall 2011:210 [ref. 31755] dated 1859, Bruton et al. 2018:87 [ref. 36373], Skelton 2019:229, 236 [ref. 36564], Kisekelwa et al. 2020:[11] 710 [ref. 38315], Bitja-Nyom et al. 2021:3796 [ref. 38608], Munene et al. 2021:25 [ref. 39283], Stiassny et al. 2021:1688 [ref. 39000], Fermon et al. 2022:246 [ref. 39448], Walsh et al. 2022:[6] [ref. 39281], Lamboj & Koblmüller 2022:[12] [ref. 39796]). Current status: Valid as Hemichromis elongatus (Guichenot 1861). Cichlidae: Pseudocrenilabrinae. Distribution: West-central Africa: coastal rivers of Lower Guinea and middle Congo basin. Introduced in Hawaiian Islands (U.S.A.). Habitat: freshwater.