Tasmocrossea benthicola is a species of very small sea snail, a marine gastropod mollusk or micromollusk in the family Skeneidae.
This is the only species in the genus Tasmocrossea, a monotypic genus.
The height of the shell attains 1.05 mm, its diameter 0.97 mm.
This marine species is endemic to New Zealand and occurs off the Lord Howe Rise in the Tasman Sea at a depth of 536 m.
