Calliostoma fragum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.[2]

Calliostoma fragum
Drawing with two views of a shell of Calliostoma fragum
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Calliostomatidae
Genus: Calliostoma
Species:
C. fragum
Binomial name
Calliostoma fragum
(Philippi, 1848) [1]
Synonyms[2]
  • Trochus fragum Philippi, 1848
  • Zizyphinus fragum Philippi in Reeve

Description

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The height of the shell attains 8 mm. The subperforate shell has a conical shape. It is pale purplish-brown, painted with whitish stripes, with 4 distant series of granules. The eight granulate whorls have their basal margins prominent. The interstices are very delicately obliquely striate. The base is a little convex, sculptured with 8 flat subgranose concentric lirae, each one divided by a furrow into two parts, alternating with narrow elevated lines. The smooth aperture is rhomboidal. The columella is a little oblique, and subtruncate at its base.[3]

Distribution

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This marine species occurs off the Philippines.

References

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  • "Calliostoma fragum". Gastropods.com. Retrieved 15 January 2019.