Macromphalina susoi is a species of very small sea snail, a marine gastropod mollusk in the family Vanikoridae.

[1] It is found in the eastern Gulf of Mexico.

[2] The maximum recorded shell length is 3.2 mm.

[3] Minimum recorded depth is 37 m.[3] Maximum recorded depth is 37 m.[3]

This Vanikoridae-related article is a stub.