Margarella antarctica

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

Margarella antarctica
Original image of a shell of Margarella antarctica
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 antarctica Powell, 1951
  • Margarita antarctica Lamy, 1905 (basionym)
  • Valvatella antarctica (Lamy, 1905)

Distribution

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

Description

The maximum recorded shell length is 12.5 mm.[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]

Habitat

Minimum recorded depth is 0 m.[3] Maximum recorded depth is 24 m.[3]

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References
  1. 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. 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.
  • Zelaya D.G. (2004) The genus Margarella Thiele, 1893 (Gastropoda: Trochidae) in the southwestern Atlantic Ocean. The Nautilus 118(3): 112–120
  • Engl W. (2012) Shells of Antarctica. Hackenheim: Conchbooks. 402 pp
  • "Margarella antarctica". Gastropods.com. Retrieved 16 January 2019.
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