Ariadnaria borealis

Ariadnaria borealis
Ariadnaria borealis shell (specimen at the Natural History Museum, Rotterdam)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Capulidae
Genus:	Ariadnaria
Species:	A. borealis
Binomial name
Ariadnaria borealis (Broderip & G. B. Sowerby I, 1829)
Synonyms [1]
Fusus umbilicatusT. Brown, 1839 (possible senior synonym, never used in recent literature) Trichotropis acuminatusJeffreys, 1867 (dubious synonym) Trichotropis atlanticaMöller, 1842 Trichotropis borealisBroderip & Sowerby, 1829 Trichotropis borealis var. acuminataHägg, 1905 Trichotropis costellataCouthouy, 1838 Trichotropis costellatusCouthouy, 1838 · Trichotropis herzensteiniDerjugin et Gurjanova, 1926 Trichotropis inermisHinds, 1877 Trichotropis saintjohnensisVerkrüzen, 1877

Ariadnaria borealis, common name the boreal hairysnail, is a species of small sea snail, a marine gastropod mollusk in the family Capulidae, the cap snails. ^[1]

Distribution

This species occurs in the North Sea, the Canadian part of the Arctic Ocean, in the Northwest Atlantic Ocean; circumpolar in Arctica, White Sea, in Pacific from Peter the Great Gulf and northern Japan. Sea to Bering Sea

Description

The maximum recorded shell length is 22 mm. ^[2]

(Original description}} The shell has a rather oblong shape, featuring three to four whorls that are somewhat rounded. It is equipped with three or four not very prominent, obtuse keels, with smaller intervening striae that are crossed by the lines of growth. The columella and the siphonal canal immediately below it are somewhat more elongated than in the previous species. The umbilicus is also slightly more expanded, making it less linear compared to the Trichotropis bicarinata . Along its edge and on the keels of the exterior of the shell, the epidermis presents numerous bristle-like appendages. ^[3]

Habitat

Minimum recorded depth is 2 m. ^[2] Maximum recorded depth is 574 m. ^[2]

References

1. Ariadnaria borealis (Broderip & Sowerby G.B. I, 1829) . Gofas, S. (2009). Ariadnaria borealis (Broderip & Sowerby G.B. I, 1829). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2009) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=714762 on 27 June 2013 .
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 .
3. Broderip, W. J. & Sowerby, G. B. I. (1829). "Broderip, W. J. & Sowerby, G. B. I. (1829)". Broderip, W. J. & Sowerby, G. B. I. (1829). 4: 375. Retrieved 4 November 2025. This article incorporates text from this source, which is in the public domain .

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