Protoconch wide, whitish about 4.2 whorls, with a prominent cord just on the suture. Teleoconch with about 7-8 whorls. The subsutural spiral cord is narrow, less prominent and smaller than spiral cords 2 and 3 in the first 3-4 whorls; the three are equal in later whorls. The brown colour of spiral cord 1 begins on the second or third whorl of the teleoconch, it is limited to this spiral cord and not extended to the suture; the base is uniformly white. Aperture rounded, siphonal canal short. The specific name is derived from the Latin word dilatus which means "be different" as an allusion to the similarity and differences with the previous species.

This species can easily be distinguished from C. lata and C. io by its teleo¬conch of 7-8 whorls and its larger shell. Furthermore, these two species have a proto-conch without sculpture.
- C. cruzana has a wider shell; the base is concave; the protoconch is white and narrow.
- C. beneitoi spec. nov. has a smaller and more fragile shell, the suture is more evident, the upper spiral cord is narrow and light brown; the protoconch is narrower and with a spiral cord more distant from the suture, in which there are small riblets.
- C. familiarum spec. nov. has a wider shell with a darker upper cord, the colour almost reaches the suture and the base is white; protoconch light brown or yellowish, wider, with very evident riblets in the suture.

Distribution: The present species is known from Cuba and Nicaragua. Type locality: Cienfuegos, Cuba.