Cyphoma macumba is a species of sea snail, a marine gastropod mollusk in the family Ovulidae, the ovulids, cowry allies or false cowries.
This species has become an (uncertain) synonym of Cyphoma gibbosum <small>(Linnaeus, 1758)</small>
Endemic to Brazil - from Ceará to Rio de Janeiro State (belonged to the Bahian Subprovince, including Abrolhos archipelago, according to Petuch, 2013).
The maximum recorded shell length is 32.5 mm.
Minimum recorded depth is 2 m. Maximum recorded depth is 10 m.