Margarella antarctica
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| 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 | |
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Margarella antarctica is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae, the top snails.[2]
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]
References
- ↑ 1.0 1.1 Charcot, Lamy et. al. (1906), Expédition antarctique française (1903-1905) fasc. 3 (1906)
- ↑ Margarella antarctica (Lamy, 1905). Retrieved through: World Register of Marine Species on 19 December 2012.
- ↑ 3.0 3.1 3.2 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
External links
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