Calliostoma supragranosum

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Calliostoma supragranosum
Calliostoma supragranosum.jpg
An unusual color pattern shell of Calliostoma supragranosum Carpenter, 1864 from Laguna Beach, California
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Calliostomatidae
Subfamily: Calliostomatinae
Genus: Calliostoma
Swainson, 1840 [1]
Species:
C. supragranosum
Binomial name
Calliostoma supragranosum
Carpenter, 1864
Synonyms
  • Calliostoma formosumCarpenter, 1864
  • Calliostoma splendensCarpenter, 1864

Calliostoma supragranosum Carpenter, 1864 [2] is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae, which was formerly placed within the Trochidae or top snails. Its common name is the granulated top snail.

Description

This is a small species. The height of the rather thin, conical shell varies between 6 mm and 15 mm. It is imperforate. The shell is composed of 5 convex whorls. The sculpture of the shell is characterized by numerous fine spiral cords that are strongly beaded in the early whorls, and may become weakly beaded on later whorls. The apical whorls is very minute, smooth, and whitish. The next 2 whorls are encircled by 2 strong, articulated ribs. On the next whorl these ribs become beaded, and smaller beaded riblets appear above them. The body whorl has 4 (or 5) strong, elevated ribs around the middle, above them two or three beaded ribs. The base of the shell has 9 fine, distinct smooth concentric lirae. The body whorl is somewhat biangular at periphery, slightly convex beneath. The oblique aperture is nearly round. The peristome is thin, a trifle crenulated inside. The columella has a slight excavation, and is very bluntly nodulous near the base. The interior is brightly nacreous

The shell color is typically a light yellowish-brown with irregular lighter, subsutural maculations, very occasionally with pink or purple beads or rarely a stripe. It has a peripheral circle of alternating chestnut and white spots. The ribs of the base are minutely articulated with chestnut and white. [3] [4] [5]

Distribution

This species occurs from Monterey Bay, California to Asuncion Island southern Baja California, Mexico. [6]

Related Research Articles

<i>Calliostoma</i> Genus of gastropods

Calliostoma is a genus of small to medium-sized sea snails with gills and an operculum, marine gastropod molluscs within the family Calliostomatidae, the Calliostoma top snails. Previously this genus was placed within the family Trochidae. Calliostoma is the type genus of the family Calliostomatidae.

<i>Calliostoma canaliculatum</i> Species of gastropod

Calliostoma canaliculatum, common name the channeled topsnail, is a species of small sea snail with gills and an operculum, a marine gastropod mollusk in the family Calliostomatidae, the calliostoma top snails.

<i>Calliostoma allporti</i> Species of gastropod

Calliostoma allporti, common name the Allport top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma crassicostatum</i> Species of gastropod

Calliostoma crassicostatum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma gemmulatum</i> Species of gastropod

Calliostoma gemmulatum, common name the western gem top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma granulatum</i> Species of gastropod

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

<i>Tristichotrochus multiliratus</i> Species of gastropod

Tristichotrochus multiliratus is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma occidentale</i> Species of gastropod

Calliostoma occidentale, common name the boreal topsnail, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma quadricolor</i> Species of gastropod

Calliostoma quadricolor is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma tricolor</i> Species of gastropod

Calliostoma tricolor, common name the three-coloured top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Astele scitula</i> Species of gastropod

Astele scitula is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma apicinum</i> Species of gastropod

Calliostoma apicinum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma coppingeri</i> Species of gastropod

Calliostoma coppingeri is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma eximium</i> Species of gastropod

Calliostoma eximium is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma fonki</i> Species of gastropod

Calliostoma fonki is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

Calliostoma nepheloide, common name the Nephelo top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma platinum</i> Species of gastropod

Calliostoma platinum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Calliostoma venustum</i> Species of gastropod

Calliostoma venustum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

<i>Perrinia nigromaculata</i> Species of gastropod

Perrinia nigromaculata is a species of sea snail, a marine gastropod mollusk in the family Chilodontidae.

<i>Tristichotrochus consors</i> Species of mollusc

Tristichotrochus consors is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

References

  1. ↑ Swainson W. J. (1840). Treat. Malacol.218: 351.
  2. ↑ Calliostoma supragranosum Carpenter, 1864 . Retrieved through: World Register of Marine Species  on 6 October 2011.
  3. ↑ Marine Shells of Southern California, by James H. McLean, Natural History Museum of Los Angeles County, Science Series 24, Revised Edition (1978), p. 20
  4. ↑ American Seashells (Second Edition, 1974), by R. Tucker Abbott, p. 47, ISBN   0-442-20228-8
  5. ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
  6. ↑ Marine Shells of Southern California, by James H. McLean, Natural History Museum of Los Angeles County, Science Series 24, Revised Edition (1978), p. 20
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