Calliostoma javanicum

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Calliostoma javanicum
Calliostoma javanicum shell.jpg
Apertural and umbilical view of the shell of Calliostoma javanicum.
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Calliostomatidae
Genus: Calliostoma
Species:
C. javanicum
Binomial name
Calliostoma javanicum
(Lamarck, 1822)

Calliostoma javanicum, common name the chocolate-lined top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. [1]

Contents

Description

The height of the shell varies between 19 mm and 35 mm. The conical shell has straight outlines. The base of the shell is flat, with a deep, funnel-shaped umbilicus. The shell is rather solid. It is light yellowish, with numerous narrow, sharply-defined dark-brown or blackish spiral lines. The outlines of the spire are straight. The sutures are not at all impressed. The minute apex is smooth. There are about nine, flat whorls, encircled by numerous equal, finely-beaded lirae of which there are about 9 on penultimate whorl. The interstices are densely costulated by fine incremental striae. The body whorl is acutely angled at the periphery. It is flat below and nearly smooth toward the outer edge, and finely granose-striate on the inner half. The aperture is rhomboidal. The lip is thin. The columella is arcuate above, and strongly toothed below. The umbilicus is wide and bounded by a beaded cord. [2]

Distribution

This species occurs in the Caribbean Sea, the Gulf of Mexico and the Lesser Antilles; in the Atlantic Ocean off Eastern Brazil.

Description

The maximum recorded shell length is 35 mm. [3]

Habitat

Minimum recorded depth is 1 m. [3] Maximum recorded depth is 97 m. [3]

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References

  1. ↑ Calliostoma javanicum (Lamarck, 1822) . Retrieved through: World Register of Marine Species  on 12 December 2012.
  2. ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
  3. 1 2 3 Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi : 10.1371/journal.pone.0008776.
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