Calliostoma circumcinctum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Description The maximum recorded shell length is 13 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. .
(Original description by W.H. Dall) The solid, strong, white shell has an elevated, conical shape. It contains seven whorls The small, dextral nucleus is polished and delicately reticulate The other whorls have two sharp, much produced, thin keels These are a little recurved at their edges, and crossed only by most delicate lines of growth. The base of the shell is flattened, ornamented with nine angular ribs, the outermost produced somewhat. There is no umbilicus The aperture is subrectangular, notched by the keels. The simple columella projects somewhat at its anterior end, and is not callous. The appressed suture is distinct, not channelled.Dall, W. H. 1881. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico, and in the Caribbean Sea, 1877-79, by the United States Coast Survey Steamer 'Blake,'. Bulletin of the Museum of Comparative Zoology 9: 33-144
Distribution Found in the Caribbean Sea and the Gulf of Mexico.Calliostoma circumcinctum. 20 February 2012.
Habitat Minimum recorded depth is . Maximum recorded depth is .
References
Rosenberg, G., F. Moretzsohn, and E. F. García. 2009. Gastropoda (Mollusca) of the Gulf of Mexico, pp. 579–699 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.