| Spermodea lamellata | |
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| A group of shells of Spermodea lamellata | |
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| Species: | S. lamellata
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| Binomial name | |
| Spermodea lamellata | |
| Synonyms | |
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Acanthinula lamellata[2] | |
Spermodea lamellata is a species of minute European land snail, a terrestrial gastropod mollusc, or micromollusc, in the family Valloniidae.
Description[edit]
For terms see gastropod shell.
The 2-2.2 mm x 2-2.2 mm shell has a characteristic semispherical shape like a bee skep basket. The shell has 6 convex whorls which increase gradually in size. The sutures are deep. The whorls are decorated with very fine, very regular, radial ribs. These ribs function as a diffraction grating, giving the yellow shell a silky appearance. The apertural margin is simple and breaks easily. There are no folds inside the aperture. The umbilicus is narrow. Juveniles are paler with weaker ribs at the lower side, and the umbilicus relatively wider.
Distribution[edit]
This species occurs in areas which include:
- Denmark
- Great Britain
- Ireland
- Czech Republic
- Northern Germany[3]
- Netherlands - extinct[4]
- Norway
- Poland - isolated locality
- Portugal - isolated localities in Serra de Bussaco mountains (in Beira Alta), and in Sintra[5]
- Sweden
- Ukraine[6]
- and other areas
Habitat[edit]
This minute snail lives in ancient woodland.
References[edit]
- ^ Jeffreys, J. G. 1830. A synopsis on the testaceous pneumonobrancheous Mollusca of Great Britain. - Transactions of the Linnean Society of London 16 (2): 323-392.
- ^ Janus, Horst, 1965. ‘’The young specialist looks at land and freshwater molluscs’’, Burke, London
- ^ "MollBase". Retrieved 2007-06-20.
- ^ [1] ANEMOON
- ^ AnimalBase :: Spermodea lamellata species homepage
- ^ Balashov I. & Gural-Sverlova N. 2012. An annotated checklist of the terrestrial molluscs of Ukraine. Journal of Conchology. 41 (1): 91-109.
External links[edit]
- Spermodea lamellata at Animalbase taxonomy,short description, distribution, biology,status (threats), images