† Kurtziella (Cryoturris) dianema Woodring 1928 Cryoturris dianema is an extinct species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

[1] The length of the shell attains 6.9 mm, its diameter 2.2 mm.

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.

[2]