citrinellus, Heros Günther [A.] 1864:153 [Proceedings of the Zoological Society of London 1864 (pt 1) (art. 3) (for 22 Mar. 1864); ref. 13930] Lake Nicaragua, Nicaragua. Syntypes: BMNH 1864.1.26.201-203 (3). •Valid as Cichlosoma citrinellum (Günther 1864) -- (Villa 1982:190 [ref. 36708], Bussing 1987:195 [ref. 22927]). •Valid as Cichlasoma citrinellum (Günther 1864) -- (Page & Burr 1991:332 [ref. 18983], Conkel 1993:83 [ref. 22949], Fuller et al. 1999:420 [ref. 25838], Nelson et al. 2004:151 [ref. 27807]). •Valid as Amphilophus citrinellus (Günther 1864) -- (Kullander & Hartel 1997:195 [ref. 22732], Bussing 1998:312 [ref. 24179], Burgess 2000:54 [ref. 24818], Kullander in Reis et al. 2003:610 [ref. 27061], Stauffer & McKaye 2002:8 [ref. 27240], Mundy 2005:418 [ref. 28379], Stauffer et al. 2008:117 [ref. 29556], Scharpf 2009:3 [ref. 30400] as citrinellum, Oldfield 2009:1 [ref. 30478], Page & Burr 2011:610 [ref. 31215], Page et al. 2013:156 [ref. 32708], Kottelat 2013:373 [ref. 32989], Angulo et al. 2013:1004 [ref. 33194], Říčan et al. 2016:37 [ref. 34357], Robins et al. 2018:364 [ref. 35886], Poniente et al. 2020:57 [ref. 37327], Rodríguez-Barrera et al. 2020:45 [ref. 37800], Angulo 2021:13 [ref. 38913], Jamaluddin et al. 2022:[7] [ref. 39245], Angulo et al. 2023:48 [ref. 40676], Chan et al. 2023:143 [ref. 40365]). Current status: Valid as Amphilophus citrinellus (Günther 1864). Cichlidae: Cichlinae. Distribution: Central America: Atlantic slope of Nicaragua and Costa Rica. Established in Florida and Puerto Rico (U.S.A.), Malaysia, Singapore and Philippines. Introduced in Hong Kong (China). Habitat: freshwater.