margaritifer, Heros Günther [A.] 1862:287 [Catalogue of the fishes in the British Museum v. 4; ref. 1969] Lake Petén [Petén Itza], Guatemala. Holotype (unique): BMNH 1864.1.26.62. •Valid as Cichlasoma margaritiferum (Günther 1862) -- (Conkel 1993:92 [ref. 22949]). •Valid as Amphilophus margaritiferum (Günther 1862) -- (Burgess 2000:54 [ref. 24818]). •Valid as Amphilophus margaritifer (Günther 1862) -- (Kullander in Reis et al. 2003:611 [ref. 27061]). •Possibly a hybrid Thorichthys affinis x Vieja melanura -- (Říčan et al. 2016:24 [ref. 34357]). Hybrid. Cichlidae: Cichlinae. Distribution: Atlantic slope of Guatemala [if valid]. Habitat: freshwater.