Alvania cimicoides (Forbes 1844)

Alvania cimicoides is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.

Alvania cimicoides là một loài ốc biển nhỏ, là động vật thân mềm chân bụng sống ở biển trong họ Rissoidae.

Type of larval development: planktotrophic

Shell 3 to 4 mm high, protoconch with 2.5 convex whorls, teleoconch with 4-4.5 whorls, moderately solid. Sculpture of protoconch of spiral rows of fine granules, indistinct in optical microscopy; sculpture of teleoconch with spiral cords as narrow as the interspaces, and orthocline axial ribs thicker than the cords. Tee suture is characteristically excavated, situated in a channel delimited by two stronger cords just above and below. Aperture with a distinct outer rim over which the cords are continued; this rim slightly bulging near its adapical end; inner part of outer lip with slight denticles. Colour characteristically brown on protoconch, whitish to buff on the remainder of the shell with a diagnostic comma-shaped darker brown mark on the outer lip.

Eastern Atlantic, from Norway and Iceland to Morocco, and throughout the Mediterranean, usually in 100-1000 m depth; also present in the Canary Is., Madeira and the Azores. Gorringe, Josephine, Seine and Ampère seamounts, moderately common in 210-330 m