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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Pseudocrenilabrinae
Etymology: Placidochromis: Latin, placidus = of peaceful or tranquile appearance + Greek, chromis = a fish, perhaps a perch (Ref. 45335); macrognathus: Derived from the Greek "makros" = large and "gnathos" = jaw, in reference to its large mouth (Ref. 55898).