Calliostoma granulatum

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Calliostoma granulatum
Calliostoma granulatum 01.JPG
Shell of Calliostoma granulatum
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. granulatum
Binomial name
Calliostoma granulatum
(Born, 1778) [1]
Synonyms [2]
  • Calliostoma papillosa(Da Costa, 1778)
  • Trochus fragilisPulteney (not Gmel.)
  • Trochus papillosumDa Costa, 1778
  • Ziziphinus granulatusBrusina

Calliostoma granulatum, common name the European granular top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. [2]

Contents

Illustration of Calliostoma granulatum from Natural History: Mollusca (1854) Natural History - Mollusca - Granulated Trochus.png
Illustration of Calliostoma granulatum from Natural History: Mollusca (1854)

Some authors place this taxon in the subgenus Calliostoma (Maurea).

Description

The height of the shell varies between 18 and 35 mm (0.71 and 1.38 in). The thin, light and acutely conical shell is imperforate. It is corneous or flesh-colored, more rarely rich orange, unicolored or sparsely articulated on the basal rilblets[ check spelling ] with rich brown, and frequently with rather obscure clouded niaculations of pale brown above. The surface is shining, closely sculptured by numerous narrow threads or riblets, which on the spire are contiguous, finely, regularly beaded. They become more separated on the body whorl. The interstices are obliquely striate. The spiral riblets are either granulate or nearly smooth. The base of the shell shows numerous concentric lirulae that are granose or nearly smooth. Their interstices are radiately striate. The elevated spire is slender, its outlines concave. The apex is minute. The apical whorl is smooth and rounded. The suture is linear. Its position is marked by a slightly prominent double granose cingulus above it. There are about eight, flat whorls. The last one is strongly angular at the periphery and convex beneath. The aperture is subquadrate and finely sulcate inside. The subvertical columella is arcuate and cylindrical.

Distribution

This marine species occurs in the Atlantic Ocean from Shetland to the Azores, Madeira and the Canary Islands; in the Western Mediterranean Sea and the Adriatic Sea.

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References

  1. ↑ Born, Ind. Rer. Natur. Mus. Caes. Vind., p. 343 (1778)
  2. 1 2 Calliostoma granulatum (Born, 1778) . Retrieved through: World Register of Marine Species  on 12 December 2012.
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