Cryoturris dianema

Cryoturris dianema is an extinct species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

Description
The length of the shell attains 6.9 mm, its diameter 2.2 mm.

Distribution
This extinct marine species occurs in Pliocene strata of the Bowden Formation, Jamaica; age range: 3.6 to 2.588 Ma. It was also found on the nordeastern continental platform of Brazil.