Calliostoma alternum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.Rosenberg, G. (2012). Calliostoma alternum Quinn, 1992. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532281 on 2012-12-07
Description The height of the shell attains 16 mm. The umbilicate shell has a conical shape. It is finely sculptured. The aperture is subquadrate wit thin lips. The rather thin columella is weakly sigmoid and ends in a rounded denticle.
Distribution This species occurs in the Caribbean Sea off Colombia, Venezuela and Suriname.
References
J.F. Quinn, New Species of Calliostoma Swainson, 1840 (Gastropoda: Trochidae), and Notes on Some Poorly Known Species from the Western Atlantic Ocean; The Nautilus v. 106 (1992-1993)
External links Biodiversity Heritage Library (1 publication) Encyclopedia of Life USNM Invertebrate Zoology Mollusca Collection World Register of Marine Species