Gyraulus

Gyraulus; Temporal range: Early Cretaceous - Recent,
	Two shells of Gyraulus crista
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Superorder:	Hygrophila
Family:	Planorbidae
Subfamily:	Planorbinae
Tribe:	Planorbini
Genus:	Gyraulus; Charpentier, 1837
Type species
	Planorbis albus O. F. Müller, 1774;
Synonyms
	Anisus (Gyraulus) Agassiz in Charpentier, 1837 (Gyraulus has genus rank); Armiger Hartmann, 1843 (Armiger is ranked as subgenus of Gyraulus); Caillaudia Bourguignat, 1883; Glyptanisus Iredale, 1943; Gyraulus (Armiger) Hartmann, 1843; Gyraulus (Caillaudia) Bourguignat, 1883; Gyraulus (Carinogyraulus) Polinski, 1929; Gyraulus (Choanomphalodes) Lindholm, 1927; Gyraulus (Gyraulus) Charpentier, 1837; Gyraulus (Lamorbis) Starobogatov, 1967; Gyraulus (Torquis) Dall, 1905; Lamorbis Starobogatov, 1967; Planorbis (Armiger) Hartmann, 1843 (Armiger is ranked as subgenus of Gyraulus); Planorbis (Gyraulus) Agassiz in Charpentier, 1837 (Gyraulus is treated as separate genus);

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

The genus Gyraulus is known from the Early Cretaceous to the present. Fossils attributed to Gyraulus sp. have been found in the lakebottom sediments of the Yixian Formation in China, dating to 125 million years ago.

The minute species Gyraulus crista, although technically a pulmonate gastropod, does not use air for respiration, but instead has a mantle cavity which has much water.

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