Skenea diaphana is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.

[1] The size of the shell attains 2.5 mm.

The 3½ whorls are very convex with a deep suture.

They are smooth, except twenty to twenty-five close spiral lines around the umbilical perforation.

[2] This species occurs in the Atlantic Ocean from Virginia, USA, to Brazil.