Ancylini is a tribe of small, freshwater, air-breathing limpets, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies. This tribe used to be treated as a family; the current taxonomic placement within Planorbidae is according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). 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 in situations where the limpet is unable to reach the surface for air, as is often the case. Genera Genera in the tribe Ancylini include: Ancylus Müller, 1773 - type genus Pseudancylus Rhodocephala Ferrissia Walker, 1903 Rhodacmea Walker, 1917 Sineancylus Gutiérrez Gregoric, 2014 Anisancylus Pilsbry & Vanatta, 1924 Burnupia Walker, 1912 Gundlachia Pfeiffer, 1849 Hebetancylus Pilsbry, 1914 Laevapex Walker, 1903 Stimulator Uncancylus Pilsbry, 1913 References External links Three individuals of Laevapex fuscus hitchhiking on a water bug, which can fly between ponds Planorbidae Taxa named by Constantine Samuel Rafinesque