Cyclostrema cancellatum

Cyclostrema cancellatum is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.[1]

Cyclostrema cancellatum
Drawing with a top view of a shell of Cyclostrema cancellatum
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Vetigastropoda
Superfamily:	Trochoidea
Family:	Liotiidae
Genus:	Cyclostrema
Species:	C. cancellatum
Binomial name
Cyclostrema cancellatum Marryat, 1818
Synonyms
Delphinula cancellata Kiener, L.C., 1838 Liotia (Lipistes) acrilla Dall, W.H., 1889

Description

The size of the shell varies between 8 mm and 15 mm. The white, sublenticular shell is flattened convex above, more convex below. It contains oblique radiating riblets, interrupted by an obtuse peripheral rib The interstices of the riblets are finely spirally striated. The umbilicus has a moderate size.[2]

(Description by W.H. Dall) The thin, white shell has a planorboid shape with 3½ whorls. The radiating sculpture consists of about fifteen ridges, faint on the base and summit, making small nodules where they cross the fine spirals, and prominent and strong on the periphery between the three peripheral carinae. Other radiations are only due to lines of growth which are sometimes slightly elevated. The spiral sculpture consists of three prominent and strong peripheral ridges, of which the uppermost forms the chief periphery. The others are slightly nearer the axis. Between these, nearly square deep reticulations are formed by the radiating ridges before described. Beside these there are three faint spirals on the upper and three on the basal surface, nodulated at their intersections with the radii. There is an ample umbilicus. The inner margin of the aperture is nearly circular, the outer part modified by the sculpture.[3]

Distribution

This species occurs in the Caribbean Sea, the Gulf of Mexico and the Lesser Antilles; in the Atlantic Ocean from southeast Florida to Brazil at depths between 0 m and 2012 m.

References

1. Cyclostrema cancellatum Marryat, 1818. Retrieved through: World Register of Marine Species on 22 April 2010.
2. G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
3. Dall W. H. 1889. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer "Blake", Lieut.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda. Bulletin of the Museum of Comparative Zoölogy at Harvard College 18: 1–492, pls. 10–40 (described as Liotia (Lipistes) acrilla)

• Kiener, L. C. 1838. Genre Dauphinule. (Delphinula, Lam.). Spécies Général et Iconographie des Coquilles Vivantes 10: 12 pp., 4 pls.
• 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.

External links

• "Cyclostrema cancellatum". Gastropods.com. Retrieved 16 January 2019.