Phaeoptyx is a genus of cardinalfishes native to the western Atlantic Ocean.
Species The recognized species in this genus are:Mabuchi, K., Fraser, T.H., Song, H., Azuma, Y. & Nishida, M. (2014): Revision of the systematics of the cardinalfishes (Percomorpha: Apogonidae) based on molecular analyses and comparative reevaluation of morphological characters. Zootaxa, 3846 (2): 151–203. Phaeoptyx conklini (Silvester, 1915) (freckled cardinalfish) Phaeoptyx pigmentaria (Poey, 1860) (dusky cardinalfish) Phaeoptyx xenus (J. E. Böhlke & J. E. Randall, 1968) (sponge cardinalfish)
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