Cyclostrema subexcavatum

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

Cyclostrema subexcavatum
Original drawing with two views of a shell of Cyclostrema subexcavatum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Liotiidae
Genus: Cyclostrema
Species:
C. subexcavatum
Binomial name
Cyclostrema subexcavatum
Tryon, 1888
Synonyms
  • Cyclostrema (Daronia) subexcavata Tryon, 1888 (original description)
  • Cyclostrema excavata Watson, 1886 (preoccupied by Carpenter)

Description

(Original description by G.W. Tryon) The height of the shell attains 2.2 mm. The umbilicus is wide, perspective and shallow. The shell is whitish under a yellowish brown, membraneous epidermis. The spire is scarcely raised. The 4 whorls increase rather slowly until the last, which is rather large. The suture is broadly, angularly impressed. A little below the suture there is a bluntly angulated spiral keel. And on the middle of the base, towards the oblique aperture there is another keel. The thin peristome is simple.[2]

Distribution

This marine species occurs off Puerto Rico at a depth of about 700 m.

References
  1. Rosenberg, G. (2012). Cyclostrema subexcavatum. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532707 on 2012-12-03
  2. G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
  • Watson, R. B. 1886. Report on the Scaphopoda and Gasteropoda collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger, Zoology 15(2): i-v, 1-680, 692-756, 50 pls. Her Majesty's Government: London
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