Calliostoma fragum

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
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Vetigastropoda
Superfamily:
Trochoidea
Family:
Calliostomatidae
Subfamily:
Calliostomatinae
Genus:
Calliostoma
Species:
C. fragum
Binomial name
Calliostoma fragum
(Philippi, 1848) [1]
Synonyms[2]
  • Trochus fragum Philippi, 1848
  • Zizyphinus fragum Philippi in Reeve

Description

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

This marine species occurs off the Philippines.

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References
  1. Phiippi., Zeitschr. f Mal. 1848, p. 106
  2. Calliostoma fragum (Philippi, 1848). Retrieved through: World Register of Marine Species.
  3. Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
  • "Calliostoma fragum". Gastropods.com. Retrieved 15 January 2019.
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