Crassispira aegis is an extinct species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.
The length of the shell attains 45.8 mm; its diameter 13.6 mm.
Fossils have been found in Pliocene strata of the Bowden Formation of Jamaica; also on Saint Thomas; age range: 3.6 to 2.588 Ma
