Auriculastra oparica is a species of air-breathing land snail, a terrestrial gastropod mollusc in the family Ellobiidae, the salt marsh snails.
The length of the shell attains 3 mm, its diameter 1.5 mm.
(Original description in Latin) The shell is subulate-oval (slender and tapering like an awl, yet somewhat oval), slender, smooth, and tawny in color. The spire is elevated with a sharp apex. The aperture is narrow, and the columella is scarcely truncated at the front. There are three folds on the columella: the posterior fold is strong, while the two anterior folds are somewhat obsolete and oblique. The outer lip is sharp and simple.
This species occurs off French Polynesia, Indonesia and the Philippines.