Margarella antarctica

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Margarella antarctica
Margarella antarctica (MNHN-IM-2000-31126).jpeg
shell of Margarella antarctica (syntype at MNHN, Paris)
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Vetigastropoda
Superfamily:
Trochoidea
Family:
Calliostomatidae
Subfamily:
Margarellinae
Genus:
Margarella
Species:
M. antarctica
Binomial name
Margarella antarctica
(Lamy, 1905) [1]
Synonyms
  • Margarella antarcticaPowell, 1951
  • Margarita antarcticaLamy, 1905 (basionym)
  • Valvatella antarctica(Lamy, 1905)

Margarella antarctica is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae, the top snails. [2]

Contents

Distribution

This marine species occurs off South Orkney Islands, South Shetland Islands; Antarctic Peninsula, Bellingshausen Sea

Description

It is orange-yellow, with two pairs of cephalic tentacles with large black eyes. [3] The shell is small, and wider than it is high. [3] The orbicular, deeply umbilicated shell has an obtuse-conical shape. It contains four convex whorls, the last of which is adorned only by growth lines. The oblique aperture is sub-circular and pearly inside. In, adults its edges are joined by a callus . The operculum is polygyrous spiral. The color of the shell is bluish gray or greenish. [1] The maximum recorded shell length is 12.5 mm. [4]

Habitat

Minimum recorded depth is 0 m. [4] Maximum recorded depth is 24 m. [4]

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References

  1. 1 2 Charcot, Lamy et al. (1906), Expédition antarctique française (1903–1905) fasc. 3 (1906)
  2. ↑ Margarella antarctica (Lamy, 1905) . Retrieved through: World Register of Marine Species  on 19 December 2012.
  3. 1 2 Bouchet, P. (2010). Margarella whiteana Linse, 2002. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=197259 on 2011-03-17
  4. 1 2 3 Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. doi : 10.1371/journal.pone.0008776.
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