Valvata cristata
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Valvata cristata is a species of small freshwater snail with an operculum, an aquatic gastropod mollusk or micromollusk in the family Valvatidae, the valve snails.
Distribution
- Czech Republic - Bohemia and Moravia[1]
- Slovakia[1]
- Poland
- Germany - (Arten der Vorwarnliste)[2]
- Netherlands
- the British Isles: Great Britain and Ireland
- Hungary
- Kaliningrad Oblast, Russia[3]
- and other areas
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Shell description
The shell of this exceeding small (2–4 mm) Valvata species is very flat in its coiling, and therefore it somewhat resembles a Planorbis shell. However, the shell is dextral in coiling and has an operculum.[4] The shell is transparent, has 3-3.5 whorls in a circular aperture. The umbilicus is wide and open, more than 1/3 of shell diameter.
Ecology
This species lives in stagnant and slow-moving water.
Myzyk (2002)[5] described life cycle of Valvata cristata.
References
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- ↑ a b Template:In lang Horsák M., Juřičková L., Beran L., Čejka T. & Dvořák L. (2010). "Komentovaný seznam měkkýšů zjištěných ve volné přírodě České a Slovenské republiky. [Annotated list of mollusc species recorded outdoors in the Czech and Slovak Republics]". Malacologica Bohemoslovaca, Suppl. 1: 1-37. PDF.
- ↑ Template:In lang Glöer P. & Meier-Brook C. (2003) Süsswassermollusken. DJN, pp. 134, page 106, Template:ISBN
- ↑ Filippenko D. (2011). "Fauna of gastropod molluscs in the Curonian Lagoon littoral biotopes (Baltic Sea, Kaliningrad region, Russia)". Malacologica Bohemoslovaca 10: 79–83. PDF.
- ↑ Janus, Horst (1965). ‘’The young specialist looks at land and freshwater molluscs’’, Burke, London
- ↑ Myzyk S. (2002). "Life cycle of Valvata cristata O. F. Müller, 1774 (Gastropoda: Heterobranchia) in the laboratory". Folia Malacologica 10(2): 47-75. PDF.
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External links
- Valvata cristata at Animalbase taxonomy, short description, distribution, biology, status (threats), images
- Ulster Museum Image