Discus (gastropod)

Discus
A live Discus rotundatus
A live Discus catskillensis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Discidae
Genus:	Discus Fitzinger, 1833[1]
Synonyms[2]
Allerya Bourguignat, 1878 Delomphalus Charpentier, 1837 Eyryomphala H.Beck, 1837 Goniodiscus Gonyodiscus Fitzinger, 1833 Patula Held, 1838 Patularia Clessin, 1876

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.[3] 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.[3] The umbilicus is wide.[3]

Species

Species in this genus include:

subgenus Discus Fitzinger, 1833

• Discus ruderatus Férussac, 1821 – type species[4]
• Discus whitneyi (Newcomb, 1864) – Forest disc[5]

subgenus Gonyodiscus Fitzinger, 1833

• Discus brunsoni Berry, 1955 – Lake disc[5]
• Discus marmorensis H. B. Baker, 1932 – Marbled disc[5]
• Discus perspectivus J. C. M. von Mühlfeld, 1816[4]
• Discus rotundatus (O. F. Müller, 1774) – rotund disc[4][5]

subgenus ?

• Discus bryanti (Harper, 1881) – saw-tooth disc, sawtooth disc[5]
• Discus catskillensis (Pilsbry, 1896) – angular disc[5]
• Discus clappi (Pilsbry, 1924) – channelled disc[5]
• Discus macclintocki F. C. Baker, 1928 – Iowa pleistocene snail, Pleistocene disc[5]
• Discus nigrimontanus Pilsbry, 1924 – Black Mountain disc[5]
• Discus patulus (G. P. Deshayes, 1830) – domed disc[5]
• Discus selenitoides (Pilsbry, 1890) – file disc[5]
• Discus shimekii (Pilsbry, 1890) – striate disc[5]

Species brought into synonymy[6]

• Discus alternata: synonym of Anguispira alternata (superseded combination)
• Discus cronkhitei: synonym of Discus whitneyi (junior subjective synonym)
• Discus gomerensis: synonym of Canaridiscus gomerensis
• Discus laurisilvae: synonym of Canaridiscus laurisilvae
• Discus orientalus: synonym of Calogoniodiscus orientalus (superseded combination)
• Discus perelegans: synonym of Calogoniodiscus perelegans (superseded combination)
• Discus rupivagus: synonym of Canaridiscus rupivagus
• Discus serratus: synonym of Priodiscus serratus (superseded combination)
• Discus victorianus: synonym of Radiocentrum victoriana (superseded combination)
• Discus vorticella: synonym of Ctenophila vorticella (superseded combination)

References

1. Fitzinger L. I. (1833). "Systematisches Verzeichniß der im Erzherzogthume Oesterreich vorkommenden Weichthiere, als Prodrom einer Fauna derselben". Beiträge zur Landeskunde Oesterreich's unter der Enns 3: 88–122. Wien.
2. "Discus". Global Biodiversity Information Facility.
3. "Genus summary for Discus". AnimalBase, last modified 15 January 2009, accessed 13 January 2011.
4. "Species in genus Discus (n=3). AnimalBase, accessed 13 January 2011.
5. "Discus". Integrated Taxonomic Information System. Retrieved 19 June 2023.
6. MolluscaBase eds. (2022). MolluscaBase. Discus Fitzinger, 1833. Accessed through: World Register of Marine Species at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=851153 on 20 June 2023