Calliostoma bonita

Calliostoma bonita, common name the kelp top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.[1]

Calliostoma bonita
A shell of Calliostoma bonita Strong, Hanna & Hertlein, 1933, 22.7 mm height by 23.0 mm diameter, dredged from a depth of 35 to 45 fathoms (64–82 meters) offshore near Toscalota, Mexico
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Vetigastropoda
Superfamily:
Trochoidea
Family:
Calliostomatidae
Subfamily:
Calliostomatinae
Genus:
Calliostoma
Species:
C. bonita
Binomial name
Calliostoma bonita
Strong, Hanna & Hertlein, 1933

Description

The shell has a concave shoulder with a strong carination. Overall the shell is light brown to tan in color, with a bright purple channel at the edge of the inner lip. The sculpture consists of smooth spiral threads which show darker brown spots. Average size: height 23 mm, diameter 24 mm. Compare with the similar Calliostoma palmeri. Despite the range overlap there is no known intergradation between Calliostoma palmeri and C. bonita and the two species are considered to be distinct but closely related, making them sibling species.[2]

Distribution

This is a Panamic Province species which generally occurs from Mazatlan, Mexico to Acapulco, Mexico, and is found subtidally in deep water from 37 to 73 meters.[3]

References
  1. Calliostoma bonita Strong, Hanna & Hertlein, 1933. Retrieved through: World Register of Marine Species on 6 October 2011.
  2. A. Myra Keen, Sea Shells of Tropical West America (1971), Stanford University Press, p. 332
  3. A. Myra Keen, Sea Shells of Tropical West America (1971), Stanford University Press, p. 332
  • "Calliostoma bonita". Gastropods.com. Retrieved 15 January 2019.
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