Uncancylus

Uncancylus is a genus of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails and their allies.

Uncancylus
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superorder:	Hygrophila
Family:	Planorbidae
Tribe:	Ancylini
Genus:	Uncancylus Pilsbry, 1913
Species
See text

Anatomy

These animals have a pallial lung, as do all pulmonate snails, but they also have a false gill or "pseudobranch" which can serve perfectly well as a gill when they are unable to reach the surface for air.

Species

Species within the genus Uncancylus include:^[1][2]

• Uncancylus concentricus (d'Orbigny, 1835)
• Uncancylus crequi (Bavay, 1904)
• Uncancylus foncki (Philippi, 1866)
• Uncancylus patagonicus (Biese, 1948)