Discus (gastropod)
Discus is a genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Discidae, the disk snails.
Distribution
Distribution of the genus Discus include Europe, northern Asia and North America. The former subgenus Canaridiscus from the Canary Islands off North Africa, which was previously allocated to Atlantica, is now raised to a full genus.Description
Discus species have small or medium shells with ribs. The umbilicus is wide.Species
Species in this genus include:subgenus Discus Fitzinger, 1833Discus ruderatus Férussac, 1821 – type speciesDiscus whitneyi – Forest disc
subgenus Gonyodiscus Fitzinger, 1833Discus brunsoni Berry, 1955 – Lake discDiscus marmorensis H. B. Baker, 1932 – Marbled discDiscus perspectivus J. C. M. von Mühlfeld, 1816Discus rotundatus – rotund disc
subgenus ?Discus bryanti – saw-tooth disc, sawtooth discDiscus catskillensis – angular discDiscus clappi – channelled discDiscus macclintocki F. C. Baker, 1928 – Iowa pleistocene snail, Pleistocene discDiscus nigrimontanus Pilsbry, 1924 – Black Mountain discDiscus patulus – domed discDiscus selenitoides – file discDiscus shimekii – striate disc
;Species brought into synonymy:
- Discus alternata: synonym of Anguispira alternata
- Discus cronkhitei: synonym of Discus whitneyi
- Discus gomerensis: synonym of Canaridiscus gomerensis
- Discus laurisilvae: synonym of Canaridiscus laurisilvae
- Discus orientalus: synonym of Calogoniodiscus orientalus
- Discus perelegans: synonym of Calogoniodiscus perelegans
- Discus rupivagus: synonym of Canaridiscus rupivagus
- Discus serratus: synonym of Priodiscus serratus
- Discus victorianus: synonym of Radiocentrum victoriana
- Discus vorticella: synonym of ''Ctenophila vorticella''