Gyraulus

Gyraulus is a genus of small, mostly air-breathing, freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails.

Note: the minute species Gyralus crista, although technically a pulmonate gastropod, does not use air for respiration but instead has a mantle cavity which is full of water.

Distribution

Holarctic.

Habitat

On water plants in freshwater.

Shell description

Shell of the species within this genus are small, and are mostly almost planispiral in their coiling.

Species within the genus Gyraulus

• Gyraulus acronicus (A. Férussac, 1807)
• Gyraulus albus (O. F. Müller, 1774) - White ramshorn
• Gyraulus crista (Linnaeus, 1758) - Nautilus ramshorn
• Gyraulus laevis (Alder, 1838)
• Gyraulus parvus (Say, 1817)
• Gyraulus rossmaessleri (Auerswald, 1852)
• ...

External links

• http://www.biolib.cz/en/taxon/id2590/