Vertigo ultimathule

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Vertigo ultimathule
Vertigo ultimathule shell.png
Apertural view of the shell of the holotype of Vertigo ultimathule
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Order: Stylommatophora
Family: Vertiginidae
Subfamily: Vertigininae
Genus: Vertigo
Species:
V. ultimathule
Binomial name
Vertigo ultimathule
Synonyms

Vertigo (Boreovertigo) ultimathulevon Proschwitz, 2007 alternate representation

Contents

Vertigo ultimathule is a species of minute, air-breathing land snail, terrestrial pulmonate gastropod molluscs or micromollusks in the family Vertiginidae, the whorl snails. [3]

Distribution

Distribution of V. ultimathule. The large dot marks the type locality in Sweden. Vertigo ultimathule map.png
Distribution of V. ultimathule. The large dot marks the type locality in Sweden.

Vertigo ultimathule is found in:

The type locality is Pältsan-area, in the northernmost corner of Swedish Lapland. [4]

Occurrences are to be expected in other parts of Finnmark and adjacent parts of Finland and Sweden. [4] It appears that Vertigo ultimathule is rare with a very limited distribution endemic to northernmost Norway and Sweden. [4]

Description

Aperture. Vertigo ultimathule shell 6.png
Aperture.

Vertigo ultimathule is a medium-sized Vertigo, which reaches a height of 2.1–2.2 mm and a diameter of 1.3–1.4 mm, the number of whorls is 4.6–4.7. [4] The shell is almost cylindrical, with marked convex whorls, which are separated by a marked, deep suture. The shape is not distinctly ovoid, as in some other Vertigo-species, and the last whorl does not narrow markedly at the base. In side view from left the outer margin of the last whorl forms a blunt angle close to the umbilicus. The aperture is completely toothless or with only a small, delicate, rather deeply set parietal denticle. The mouth-edge is simple and scarcely thickened. The colour of the shell is light yellow – dark yellow-brown. The surface is glossy, with marked, but irregular, rather coarse striation. [4]

Apical view. Vertigo ultimathule shell 2.png
Apical view.
Umbilical view. Vertigo ultimathule shell 3.png
Umbilical view.
Lateral view. Vertigo ultimathule shell 4.png
Lateral view.
Lateral view. Vertigo ultimathule shell 5.png
Lateral view.

Ecology

The localities of Vertigo ultimathule are brook valleys or mountain slopes with mountain birch and often Salix shrubs. The pH of the ground litter was measured in two of the localities, the values obtained were 6.75 and 6.0. [4] The Norwegian localities are situated at 180–200 m altitude; the Swedish somewhat higher, at 520–620 m altitude. [4]

Related Research Articles

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<i>Balea sarsii</i> Species of gastropod

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<i>Vertigo parcedentata</i> Species of gastropod

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References

This article incorporates CC-BY-3.0 text from the reference [4]

  1. 1 2 3 von Proschwitz T. & Neubert E. (2011). "Vertigo ultimathule". The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 03 February 2015.
  2. ↑ Proschwitz T. von (2007). "Vertigo ultimathule n. sp., a new whorl-snail from northernmost Sweden (Gastropoda: Pulmonata: Vertiginidae)". Heldia5(3): 73-74, Table 9.
  3. ↑ MolluscaBase eds. (2022). MolluscaBase. Vertigo ultimathule von Proschwitz, 2007. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1050733 on 2023-02-11
  4. 1 2 3 4 5 6 7 8 9 10 von Proschwitz T. (2010). "Three land-snail species new to the Norwegian fauna: Pupilla pratensis (Clessin, 1871), Vertigo ultimathule von Proschwitz, 2007 and Balea sarsii Philippi, 1847 [= B. heydeni von Maltzan, 1881]". Fauna norvegica30: 13-19. doi : 10.5324/fn.v30i0.628

Further reading

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