Vertigo clementina

Vertigo clementina
Original drawing of a shell
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Vertiginidae
Subfamily: Vertigininae
Genus: Vertigo
Species:
V. clementina
Binomial name
Vertigo clementina
(Sterki, 1890)
Synonyms
  • Bifidaria clementina (Sterki, 1890)
  • Bifidaria clementina oldroydi Vanatta, 1916
  • Bifidaria clementina var. oldroydae Vanatta, 1916
  • Pupa clementina Sterki, 1890 (original name)
  • Sterkia (Metasterkia) clementina'' (Sterki, 1890) superseded combination
  • Sterkia clementina (Sterki, 1890)
  • Vertigo (Staurodon) clementina (Sterki, 1890) · alternate representation

The insular birddrop or San Clemente Island blunt-top snail, scientific name Vertigo clementina, is a species of small, air-breathing land snail, a terrestrial gastropod mollusk in the family Vertiginidae.[2] (Incorrectly placed within Chondrinidae in the 2006 IUCN Red List.)[1][3]

Description

(Original description) The shell is very minute, narrowly perforate and cylindrical. It is pale horn colored, transparent, with rather obtuse apex. The shell contains 5½ whorls, regularly increasing and moderately rounded. They contain a rather deep suture. The shell is smooth, with few microscopic striae, somewhat shining. The body whorl occupies rather more than two-fifths of the length of the shell and is somewhat ascending to the aperture, with a slight, revolving impression on the middle of its last half, ending at the auricle. There is a very slight, flat, crest-elevation near the margin, only in the lower part. The aperture is lateral, scarcely oblique, subovate with the palatal margin slightly flattened, the upper part of same somewhat sinuous. The peristome is a little expanded with a slightly thickened outer lip just at the margin. The shell contains six white lamellae: two on the apertural wall, the apertural, typical, and a rather long supra-apertural, ending in a callus at the upper termination of the palatal margin. The horizontal columellar margin is typical. The basal is very small, nodule-like and deep seated. The two palatals are typical, the inferior a little longer.[4]


Distribution

This species is endemic to the State of California, U.S.A. The survival of this species is "near threatened".[2]

References

  1. ^ a b Roth B. (1996). Sterkia clementina.2006 IUCN Red List of Threatened Species. Archived 27 June 2014 at the Wayback Machine Retrieved 7 August 2007.
  2. ^ a b Sterkia clementina. NatureServe Explorer, accessed 1 August 2010.
  3. ^ MolluscaBase eds. (2023). MolluscaBase. Vertigo clementina. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1431022 on 2023-02-08
  4. ^ Sterki, V. (1890). A new Pupa. The Nautilus. 4(4): 44, pl. 1, fig. 4

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