Lamellitrochus lamellosus is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.

[2] This species occurs in the Gulf of Mexico and in the Atlantic Ocean off North Carolina and Florida The maximum recorded shell length is 4.2 mm, its diameter 3.55 mm.

[3] (Original description by Verrill & Smith) The small, fragile, white, nacreous shell has a conico-turbinate shape.

The five, shouldered whorls are angulated and carinated below the middle, swollen just below the suture, which lies in a deep channel.

Within the umbilicus are radiating raised lines which cross two or three small revolving ribs.