Cantharidoscops frigidus

Cantharidoscops frigidus
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Superfamily: Trochoidea
Family: Trochidae
Genus: Cantharidoscops
Species: C. frigidus
Binomial name
Cantharidoscops frigidus
(Dall, 1919)
Synonyms

Margarites frigidus Dall, 1919

Cantharidoscops frigidus, common name the polar margarite, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[1][2]

Description

The length of the shell varies between 6 mm and 10 mm. The small, polished shell has a conic shape with pale flesh color. It consists of six whorls, including a minute subglobular nucleus. The suture is distinct but not appressed. The whorls are only moderately rounded. The axial sculpture shows faint incremental lines. The spiral sculpture has a few very faint lines near the umbilical region. The base of the shell is rounded and imperforate. The operculum is pale brown with about 8 turns. The aperture is rounded and slightly angular above. The outer lip simple and sharp. The body shows a thin nacreous glaze. The columellar lip is rounded and broader than the rest.[3]

The height of the shell attains 9 mm. The small, conic shell is polished. It has a pale flesh color. It contains six whorls, including a minute subglobular nucleus. The suture is distinct, not appressed. The whorls are only moderately rounded. The axial sculpture consists of faint incremental lines. The spiral sculpture consists of a few very faint lines near the umbilical region. The rounded base is imperforate. The operculum is pale brown with about 8 turns. The rounded aperture is slightly angular above. The outer lip is simple and sharp. The body has a thin nacreous glaze. The columellar lip is rounded, and broader than the rest.[4]

Distribution

This species occurs in the Pacific Arctic and off North Japan; and from the Admiralty Islands, Alaska to Nunivak Island, Bering Sea.

Habitat

This species is found in the following habitats:[1]

References

  1. 1 2 WoRMS (2012). Cantharidoscops frigidus (Dall, 1919). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=576619 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. ↑ Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceeding of the U.S. National Museum, vol. 56 (1920) (described as Margarites frigidus)
  4. ↑ Dall (1919) Descriptions of new species of Mollusca from the North Pacific Ocean; Proceeding of the U.S. National Museum, vol. 56 (1920) (described as Margarites frigidus)
External identifiers for Cantharidoscops frigidus
WoRMS 576619
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