Ledella rhomboidea

Ledella rhomboidea is an extinct species of sea snail, a marine bivalve mollusk in the family Nuculanidae.

Description
The length of the shell attains 2 mm, its diameter 1.3 mm.

(Original description) The shell is minute, smooth, white and shining. It is rhomboidal, rounded in front, narrowly produced behind into a short beak. The hinge line is arcuate, bearing arrow-shaped teeth, strong on the anterior slope, but less so posteriorly.

Distribution
This extinct marine species is endemic to Tasmania and were found in Tertiary strata.