Vertigo arctica

Vertigo arctica is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Vertiginidae, the whorl snails.

Vertigo arctica
Apertural view of a shell of Vertigo arctica

Near Threatened  (IUCN 3.1)[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
Superfamily:
Pupilloidea
Family:
Vertiginidae
Subfamily:
Vertigininae
Tribe:
Vertiginini
Genus:
Vertigo
Subgenus:
Vertigo
Species:
V. arctica
Binomial name
Vertigo arctica
(Wallenberg, 1858)[2]
Synonyms

Pupa arctica Wallenberg, 1858

Distribution

This species occurs in:

Drawing of aperture of Vertigo arctica

Shell description

Shell is dextral, rimate, ovate, thin, smoothish, somewhat glossy, pellucid, brownish-tawny. The shell has 5 to 5 ½ whorls, convex, the last nearly two-fifths the altitude, rounded at base, anteriorly having a somewhat swollen crest.[4]

Aperture is slightly oblique, semiovate or piriform, obstructed by 3 teeth: in the middle of the parietal wall, on the columella, and a smaller one in the palate (frequently wanting). Peristome is spreading, slightly labiate, the margins joined by a callus, the right margin very strongly curved above, columellar margin is somewhat dilated, spreading.[4]

The width of the adult shell is about 2.5 mm, the height about 1.5 mm.[4]

gollark: This one has traffic patterns closer to a real user.
gollark: It's a weird one, you have to admit.
gollark: The first three of which have the referer (not my typo) header as `http://www.bing.com/search?q=amazon`.
gollark: I also have requests which geolocate to Utah in the United States.
gollark: When they annoy me, yes.

References

This article incorporates public domain text from reference.[4]

  1. Neubert, E. (2011). "Vertigo arctica". IUCN Red List of Threatened Species. 2011: e.T196117A8998129. doi:10.2305/IUCN.UK.2011-2.RLTS.T196117A8998129.en.
  2. Wallenberg C. von 1858. Beschreibung einer neuen Pupa. Malakozoologische Blätter 5: 32. Cassel.
  3. Beata M. Pokryszko. "Vertigo arctica (Wallenberg, 1858)". Instytut Ochrony Przyrody Polskiej Akademii Nauk.
  4. Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. page 189.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.