Gyraulus crista
| Gyraulus crista | |
|---|---|
_crista.JPG) | |
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia clade Euthyneura clade Panpulmonata clade Hygrophila |
| Superfamily: | Planorboidea |
| Family: | Planorbidae |
| Subfamily: | Planorbinae |
| Tribe: | Planorbini |
| Genus: | Gyraulus |
| Subgenus: | Armiger |
| Species: | G. crista |
| Binomial name | |
| Gyraulus crista (Linnaeus, 1758)[2] | |
Gyraulus crista, commonly called the Nautilus ramshorn, is a minute species of freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.
Synonyms:
- Armiger crista
- Planorbis crista
Subspecies:
- Gyraulus crista cristatus Draparnaud, 1805
- Gyraulus crista nautileus Linnaeus, 1767
- Gyraulus crista spinulosus Clessin
Distribution
The distribution of this species is Holarctic, and includes:
- Not listed in IUCN red list - not evaluated (NE) [3]
- The Czech Republic - least concern (LC) [4]
- Germany
- Netherlands [5]
- Slovakia
- Sweden
- The British Isles, Great Britain, Ireland
Habitat
This snail lives on water plants in freshwater.
Shell description
The minute shell is nearly planispiral in its coiling, but the spire is actually considerably sunken rather than raised (which is usually the case with gastropods).
The shell has regular transverse ridges which form points extending beyond the main curve of the periphery of the shell.
The shell color is a translucent yellowy-brown. The maximum shell dimension is about 3 mm.
Life habits
This minute species, although technically a pulmonate gastropod, does not use air for respiration but instead absorbs oxygen through its mantle cavity which is full of water.
References
- ↑ [IUCN Red List of Threatened Species http://www.iucnredlist.org/apps/redlist/details/156006/0]
- ↑ 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).
- ↑ 2006 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Cited 5 March 2007.
- ↑ Juřičková L., Horsák M. & Beran L., 2001: Check-list of the molluscs (Mollusca) of the Czech Republic. Acta Soc. Zool. Bohem., 65: 25-40.
- ↑ http://www.anemoon.org/anm/voorlopige-kaarten/zoetwatermollusken/wetenschappelijk/gyraulus-crista
External links
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Wikimedia Commons has media related to Gyraulus crista. |