Bathyomphalus contortus
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| File:Planorbis contortus (Sowerby).jpg | |
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B. contortus
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| Bathyomphalus contortus |
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Bathyomphalus contortus is a species of small air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails and their allies.
Distribution
The distribution of this species is Palearctic:
It occurs in countries and islands including:
- Great Britain
- Czech Republic[3] - least concern (LC)
- Germany
- Netherlands
- Poland
- Slovakia[3]
Description
The 1-2 × 3-6 mm shell has up to 7-8 densely coiled and rounded whorls with deep suture. The whorls are higher than wide,the lower side is almost flat, the upper side with a large umbilicus which is more than 1/3 of the shell diameter. The aperture is narrow. Shell colour is reddish horny brown, often with black or brown encrustations, finely striated. The animal is blackish dark red, tentacles very long, eyes small and black.[4]
Habitat
This small snail lives in freshwater habitats.
References
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- ↑ Seddon M. B. & Van Damme D. (2014). "Bathyomphalus contortus". The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 22 February 2015.
- ↑ Linnaeus, C. 1758. Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. 10th edition. - Vermes. Testacea: 700-781. Holmiae. (Salvius).
- ↑ 3.0 3.1 (Czech) 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.
- ↑ Animalbase (Welter-Schultes)
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