''Discus'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of small air-breathing

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial molluscs, terrestrial gastropod mollusks that have gastropod shell, shel ...

terrestrial Terrestrial refers to things related to land or the planet Earth, as opposed to extraterrestrial. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on o ...

pulmonate Pulmonata or pulmonates is an informal group (previously an order, and before that, a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group inclu ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusks Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The num ...

in the family

Discidae Discidae is a taxonomic family of small air-breathing land snails, terrestrial gastropod mollusks in the superfamily Punctoidea. Genera The family Discidae has no subfamilies. Genera within the family Discidae include: * '' Anguispira'' Morse, ...

, the disk snails.

Distribution

Distribution of the genus ''Discus'' include Europe, northern Asia and North America."Genus summary for ''Discus''"

AnimalBase AnimalBase is a project brought to life in 2004 and is maintained by the University of Göttingen, Germany. The goal of the AnimalBase project is to digitize early zoological literature, provide copyright-free open access to zoological works, and p ...

, last modified 15 January 2009, accessed 13 January 2011. The former subgenus ''

Canaridiscus ''Canaridiscus'' is a genus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Discidae, the disk snails. Distribution All species are endemic to the Canary Islands The Canary Islands (; ) or Canaries ...

'' from the

Canary Islands The Canary Islands (; ) or Canaries are an archipelago in the Atlantic Ocean and the southernmost Autonomous communities of Spain, Autonomous Community of Spain. They are located in the northwest of Africa, with the closest point to the cont ...

off

North Africa North Africa (sometimes Northern Africa) is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of t ...

, 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, 1833 * '' Discus ruderatus'' Férussac, 1821 – type species"Species in genus ''Discus''
(n=3). AnimalBase, accessed 13 January 2011. * '' Discus whitneyi'' (Newcomb, 1864) – Forest disc subgenus '' Gonyodiscus'' Fitzinger, 1833 * '' Discus brunsoni''

Berry A berry is a small, pulpy, and often edible fruit. Typically, berries are juicy, rounded, brightly colored, sweet, sour or tart, and do not have a stone or pit although many pips or seeds may be present. Common examples of berries in the cul ...

, 1955 – Lake disc * '' Discus marmorensis'' H. B. Baker, 1932 – Marbled disc * '' Discus perspectivus'' J. C. M. von Mühlfeld, 1816 * ''

Discus rotundatus ''Discus rotundatus'', common name rotund disc, is a species of small, air-breathing, land snail, a terrestrial molluscs, terrestrial pulmonate gastropod mollusk in the family Discidae, the disk snails. Description The shells of ''Discus rotunda ...

'' ( O. F. Müller, 1774) – rotund disc subgenus ? * '' Discus bryanti'' (Harper, 1881) – saw-tooth disc, sawtooth disc * '' Discus catskillensis'' (Pilsbry, 1896) – angular disc * '' Discus clappi'' (Pilsbry, 1924) – channelled disc * '' Discus macclintocki'' F. C. Baker, 1928 – Iowa pleistocene snail, Pleistocene disc * '' Discus nigrimontanus'' Pilsbry, 1924 – Black Mountain disc * '' Discus patulus'' ( G. P. Deshayes, 1830) – domed disc * '' Discus selenitoides'' (Pilsbry, 1890) – file disc * '' Discus shimekii'' (Pilsbry, 1890) – striate disc ;Species brought into synonymyMolluscaBase 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: *''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

{{Taxonbar, from=Q148704 Discidae Taxa named by Leopold Fitzinger Gastropod genera