Vitrina
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| Vitrina | |
|---|---|
 | |
| An engraving of Vitrina pellucida by Orlando Jewitt from his 1863 book The land and freshwater mollusks indigenous to, or naturalized in, the British Isles | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Superfamily: | Limacoidea |
| Family: | Vitrinidae |
| Subfamily: | Vitrininae |
| Genus: | Vitrina Draparnaud, 1801 |
| Type species | |
| Cythara metria Dall, 1903 | |
| Synonyms | |
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Vitrina is genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Vitrinidae, the glass snails.[1]
The shell is globular. There is no apertural membrane. The mantle lobe is very small. There is no penial appendix, no vagina, which means that penis, oviduct and spermatheca duct join at a common point.[2]
These are closely allied species, in which the internal organization is in many cases more distinctive than the external aspect of the shell.[3]
Distribution
These species occur in North America, Greenland, Europe and northern Asia.
