Rubellatoma diomedea

Rubellatoma diomedea, common name the red-brown mangelia, is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

Description
The length of the shell attains 10 mm, its diameter 4 mm.

Distribution
R. diomedea can be found in the Gulf of Mexico, ranging from the coast of Texas to the Campeche Bank.