| Pickenia | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Cingulopsidae |
| Genus: | Pickenia |
| Species: | P. signyensis |
| Binomial name | |
| Pickenia signyensis (Ponder, 1983) | |
Pickenia is a monotypic genus of minute sea snails, a marine gastropod mollusk in the family Cingulopsidae. [1] The only known species is Pickenia signyensis, found on Signy Island in the South Orkney Islands.
The maximum recorded shell length is 1.48 mm. [2] The shell is a pale orange-brown colour, with a yellow-brown aperture. The protoconch is usually dark purple-brown. [3]
The holotype is held by Amgueddfa Cymru – Museum Wales. [4]
The species has only been found on Signy Island in the South Orkney Islands. The holotype was collected by G. Picken in 1977. [3]
The species' holotypes and paratypes were collected from rocky bottom on algae off the coast of Signy Island. [3] The minimum recorded depth is 4 m. [2] Maximum recorded depth is 10 m. [2]
The South Orkney Islands are a group of islands in the Southern Ocean, about 604 km (375 mi) north-east of the tip of the Antarctic Peninsula and 844 km (524 mi) south-west of South Georgia Island. They have a total area of about 620 km2 (240 sq mi). The islands are claimed both by Britain, and by Argentina as part of Argentine Antarctica. Under the 1959 Antarctic Treaty, sovereignty claims are held in abeyance.
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Margarella antarctica is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae, the top snails.
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Skenella is a genus of minute sea snails, marine gastropod mollusks in the family Cingulopsidae.
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Subonoba gelida is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Onoba georgiana is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Onoba grisea is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Onoba kergueleni is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
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