Vertigo parcedentata (*)

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropodae
Subclassis: Orthogastropoda
Superordo: Heterobranchia
Ordo: Pulmonata
Subordo: Eupulmonata
Clade: Stylommatophora
Cladus: Orthurethra
Superfamilia: Pupilloidea
Familia: Vertiginidae
Subfamily: Vertigininae
Tribus: Vertiginini
Genus: Vertigo
Species: Vertigo parcedentata

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Vertigo parcedentata is a species of small land snail from the family Vertiginidae.

Distribution

Recent distribution include Norway.[2]

Fossil distribution include also other parts of Europe from the Netherlands to Ukraine[3][unreliable source?]: Pleistocene and alluvium of the Rhine valley in Germany,[4] Czech Republic,[3] Slovakia,[3] etc.

Description

The shell is small, narrowly ovate. The shell has a narrow umbilical crevice and blunt summit. The shell has from 4½ to 5 convex whorls separated by a deeply impressed suture. The last whorl is forming half of the total length. First whorl is entirely smooth, the rest having rather oblique striae, of which there are several finer between two stronger striae.[4]

The aperture is semiovate, obliquely truncate above, with weakly reflected margins which are connected by a very thin callus. The right margin is weakly arched forward. It has usually one or two teeth or is wholly toothless, but it can have up to 4 teeth.[4]

Dimensions of the shell are varry acoording to the authors:

* The width of the adult shell is 1 mm, the height is 1.8-2.2 mm (Pilsbry 1918-1920).[4]
* The width of the adult shell is 1.15-1.2 mm, the height is 2-2.2 mm (Ložek 1964).[3]
* The width of the adult shell is 1.15-1.25 mm, the height is 1.7-2.3 mm (AnimalBase 2009).[2]

References

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

1. ^ (German) Braun A. 1847. Löss bei Krakau und an der Donau; Binnen-Konchylien darin. Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefakten-Kunde 1847: 49-54. Stuttgart.
2. ^ a b Species summary for Vertigo parcedentata. AnimalBase, Last modified 19-02-2009 by F. Welter Schultes.
3. ^ a b c d (German) Ložek V. 1964. Quartärmollusken der Tschechoslowakei. Rozpravy Ústředního ústavu geologického, Vol. 31, Nakladatelství ČSAV, Praha, volume 31, 374 pp., 32 tables, 4 supplements, page 206.
4. ^ a b c d e Pilsbry H. A. & Cooke C. M. 1918-1920. Manual of Conchology. Second series: Pulmonata. Volume 25. Pupillidae (Gastrocoptinae, Vertigininae). Philadelphia. page 207.