Calliostoma nudiusculum

Calliostoma nudiusculum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.[1]

Calliostoma nudiusculum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Calliostomatidae
Subfamily: Calliostomatinae
Genus: Calliostoma
Species:
C. nudiusculum
Binomial name
Calliostoma nudiusculum
(Martens, 1881)
Synonyms

Trochus (Margarita) nudiusculus Martens, 1881 (original combination)

Description

The height of the shell attains 15 mm.

Distribution

This species occurs in the Atlantic Ocean off Argentina at depths between 60 m and 100 m. The perforated, bicarinate, pearly shell has a conical shape. The 4½ whorls are gradate. The first 2 are yellowish, smooth, the following ones denuded-pearly. Beneath the suture the shell is sculptured with a series of nodules and smooth spiral lirae, few in number or evanescent. The body whorl contains elevated concentric lines on the base, stronger on the periphery, and radiating impressed lines. The aperture is rhomboid-rounded. The columellar margin is concave, thickened, below a little expanded, edentulous.[2]

References
  1. Rosenberg, G. (2012). Calliostoma nudiusculum (Martens, 1881). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=532533 on 2012-12-07
  2. Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia (described as Margarita nudiuscula)
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