Vertigo heldi

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

Vertigo heldi
Apertural view of a shell of Vertigo heldi
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
Superfamily:
Pupilloidea
Family:
Vertiginidae
Subfamily:
Vertigininae
Tribe:
Vertiginini
Genus:
Vertigo
Subgenus:
Vertigo
Species:
V. heldi
Binomial name
Vertigo heldi
(Clessin, 1877)[1]

Distribution

This species occurs in:

  • Austria
  • Bavaria in Germany
  • Switzerland

Shell description

The shell is rimate, turreted, irregularly and very finely striate, of reddish-brown color, glossy. The shell has 6 whorls, that are slowly increasing and rather convex. The first 3 whorls form a blunt summit which is about ⅓ the length of the shell. The last 3 whorls are of nearly equal height and form the remaining cylindric part of the shell. The last whorl is neither calloused nor contracted preceding the aperture.[2]

The aperture is about ¼ the length of shell, arcuately convex, somewhat impressed on the outer side, the impression running as a groove-like depression for a short distance on the last whorl. Aperture is toothed, the teeth are reddish, very weak and placed deep in the throat: 1 tooth on the middle of the parietal wall, 1 on the columella, 2 very weakly developed, frequently wanting, on the palatal wall. Peristome is continuous, somewhat expanded, little thickened.[2]

The width of the adult shell is 1.1-1.25 mm, the height is 2.4-2.7 mm.[3]

gollark: Also, you can't really do compression.
gollark: Your actual application code either can't look at revisions very well or has to deal with git for it, and merge conflicts can happen and then your application has to either just shut down and bother the user or try and deal with the stringly typed interfæces of git somehow.
gollark: Lots of these things just dump all notes in a folder of plaintext files and use git for sync/revision control, but I feel like this is a horrible system which is prone to badness.
gollark: minoteaur, coming never, will eventually never include an actual dedicated synchronization engine, to deal with this.
gollark: Currently "my notes" means "the DokuWiki data folder", which is not actually that much use since I can't access it concurrently without breaking things, meaning to make edits I have to suffer the latency back to the main osmarksßservers.

References

This article incorporates public domain text from reference.[2]

  1. Clessin S. 1877. Eine neue Pupa. Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 9 (4-5): 49-51. Frankfurt am Main.
  2. Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. pages 199-200.
  3. Species summary for Vertigo heldi. AnimalBase, accessed 23 June 2009.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.