Calliostoma adspersum

Calliostoma adspersum
Apertural view of a shell of Calliostoma adspersum
Scientific classification
Kingdom:Animalia
Phylum:Mollusca
Class:Gastropoda
Clade:Vetigastropoda
Superfamily:Trochoidea
Family:Calliostomatidae
Genus:Calliostoma
Species: C. adspersum
Binomial name
Calliostoma adspersum
(Philippi, 1851)
Synonyms
  • Trochus adspersus Beck
  • Trochus eximius Philippi,
  • Zizyphinium adspersum' Beck

Calliostoma adspersum, common name the spotted Brazilian top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.[1]

Description

The length of the shell varies between 16 mm and 28 mm. The conical shell is imperforate, whitish-gray, flammulated with rufous, and encircled by delicate granulate threads. The plane whorls are angulated with a sharp carina a little above the sutures, the last one biangulate with a second carina. The sculpture of the upper surface consists of five, fine thread-like or hair-like granulate spirals, the last forming the sharp carina over the suture. There are in the interstices finer granulose lines. The base of the shell is a little convex with 9 to 10 concentric, little elevated smooth lirae, nearly as broad as their interstices. The aperture is rhomboidal with rounded angles. The oblique columella is cylindrical and subdentate at its base, bounded by a pit at its insertion.[2]

Distribution

This marine species occurs from Colombia to Southern Brazil.

References

  1. ↑ Rosenberg, G. (2012). Calliostoma adspersum (Philippi, 1851). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532504 on 2012-12-07
  2. ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
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