« Shell small, ovate-conical, cylindrical with the upper part slender […]. Protoconch heterostrophic, submerged and semi-globose, consisting of a larval shell with non-planktotrophic development of about one and a half external whorl […]. There are five convex teleoconch whorls, showing a microsculpture consisting of spiral striae. » – Smriglio & Mariottini: “Central Tyrrhenian sea Mollusca: XI. Description of Callostracon tyrrhenicum sp. nov. (Gastropoda, Acteonidae) and remarks on other Mediterranean species of the family”, Basteria vol. 60(4-6), december 1996, p.184.

« Strong magnification reveals that these striae are indeed shallow ovoid depressions, chain-like, close to each other and equidistant […]. The suture is well impressed. Peristome straight and sub-rhomboid, narrower in the upper part. Columella straight with a little fold in the middle; outer lip crenulated. The aperture measures about 0.5 of the total height. Colour whitish hyaline. Operculum and soft parts unknown. » – Ibid.