Tricolia phasianella (Philippi, R.A., 1849) Eulithidium phasianella is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Phasianellidae, the pheasant snails.

[1][2] The shell grows to a height of 4 mm.

This species occurs in the Pacific Ocean from Nicaragua to Peru, but not off Galapagos Islands.

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