Melanella mamilla is a species of sea snail, a marine gastropod mollusk in the family Eulimidae.
Description The length of the shell attains 1.4 mm, its diameter 0.5 mm.
(Original description) The minute shell is gleaming white, and sharply pyramidal. It contains four and a half whorls, topped by a rounded, nipple-like apex. At the base, the shell opens into a wide, pear-shaped aperture The outer lip is expanded forward. The umbilical region is moderately excavated.
Distribution This marine species is endemic to Australia and occurs off Tasmania.
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