Alvania subcalathus is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Description The shell of A. subcalathus measures between 2.5 mm and 4.3 mm in length. It exhibits the typical rissoid morphology: a small, turriform shell with spiral and axial sculpture visible under magnification, often displaying a glossy, pale-colored surface. Distribution This species is found in the northeastern Atlantic Ocean, particularly around the Canary Islands and the Savage Islands. Reports indicate it occurs in subtidal zones, generally at depths down to around 12–20 meters.
References
External links Dautzenberg, P. & Fischer, H. (1906). Mollusques provenant des dragages effectués à l'ouest de l'Afrique pendant les campagnes scientifiques de S.A.S. le Prince de Monaco. Résultats des Campagnes Scientifiques Accomplies sur son Yacht par Albert Ier Prince Souverain de Monaco, 32. Imprimerie de Monaco: Monaco. 125 pp., 5 plates Segers, Willy, Frank Swinnen, and António Domingos Abreu. "An annotated checklist of the marine molluscs from the archipelagos of Madeira and the Selvagens (NE Atlantic Ocean)." (2009). Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213