Umbonium costatum

Umbonium costatum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Trochoidea (superfamily)
Family: Trochidae
Genus: Umbonium
Species: U. costatum
Binomial name
Umbonium costatum
(Kiener, 1839)
Synonyms
  • Globulus costata Valenciennes, 1838
  • Rotella costata Kiener, 1839 (original combination)
  • Umbonium (Suchium) costatum (Valenciennes, A. in Kiener, L.C., 1838)

Umbonium costatum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[1][2]

Description

The size of the shell varies between 12 mm and 25 mm. The heavy, solid shell has a depressed shape. Its spire is low-conoidal, the periphery rounded. The color pattern is whitish or light yellow, closely tessellated all .over with blackish-olive or reddish-brown squarish spots. The tessellated color-markings sometimes form subcontinuous oblique bands. The surface is shining and polished, with strong spiral grooves above, generally 4 to 6 on the body whorl. The sutures are narrowly impressed, with a rather wide margin below them, which often shows a slight tendency to be tuberculate. The base of the shell is smooth, tessellated around the irregularly convex, flesh-colored central callus. The shell contains six whorls, the last a little concave above, convex beneath. The subquadrate aperture is pearly inside. The circular callus is heaviest in front of the aperture and behind the collumellar lip. . [3]

Distribution

This species occurs in the Sea of Japan and in the East China Sea.

References

  1. Bouchet, P. (2012). Umbonium costatum (Kiener, 1839). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=556961 on 2012-11-23
  2. Kantor Yu.I. & Sysoev A.V. (2006) Marine and brackish water Gastropoda of Russia and adjacent countries: an illustrated catalogue. Moscow: KMK Scientific Press. 372 pp. + 140 pls.
  3. H. Pilsbry (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia

External links

External identifiers for Umbonium costatum
Encyclopedia of Life 4797307
NCBI 335737
WoRMS 556961
Wikimedia Commons has media related to Umbonium costatum.
This article is issued from Wikipedia - version of the Thursday, July 24, 2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.