Alycaeus jousseaumei
Alycaeus jousseaumei is a species of small land snails with a gill and an operculum, terrestrial gastropod mollusks in the family Alycaeidae.
Description
The length of the shell attains 6 mm, its diameter between 11 mm and 15 mm.The white shell is perforated and slightly depressed, with the upper whorls and protoconch distinctly elevated. The convex whorls feature a deep suture. The body whorl is notably bulging and narrows sharply just above the circular aperture. Delicate ornamentation and striations run parallel to the growth lines across the whorls. A ridge forms just above the constriction of the body whorl, filling the suture cavity to a variable extent depending on the shell's age. The peristome is double and reflexed, shaped like a horseshoe with its concave side facing the umbilicus. The operculum is horny, multi-whorled, circular and concave on the outside, with a central nucleus protruding internally.