Lepetella sierrai is a species of sea snail, a marine gastropod mollusk in the family Lepetellidae.

[2] This species is the host of the ectoparasitic copepod Lepetellicola brescianii Huys, Lopez Gonzalez, Roldan & Luque, 2002 The shell grows to a size of 2.5 mm.

This marine species occurs from the Bay of Biscay to Madeira.

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