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Aequidens is a genus of fish in the family Cichlidae found in South America. Formerly a wastebasket genus, as presently defined "Aequidens" is largely restricted to the Amazon Basin, Orinoco Basin and river basins in The Guianas. The only exceptions are "A. plagiozonatus" which also occurs in the Paraná Basin, and "A. tetramerus" which also occurs in the Parnaíba River.