Discus (gastropod)

Discus
	A live Discus rotundatus
	A live Discus catskillensis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia clade Euthyneura; clade Panpulmonata; clade Eupulmonata; clade Stylommatophora; informal group Sigmurethra
Superfamily:	Punctoidea
Family:	Discidae
Genus:	Discus; Fitzinger, 1833

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.^[2]

Discus species have small or medium shells with ribs.^[2] The umbilicus is wide.^[2]

Species in this genus include:

subgenus Discus Fitzinger, 1833

subgenus Gonyodiscus Fitzinger, 1833

subgenus ?

Discus brunsoni Berry, 1955 – Lake Disc^[4]
Discus bryanti (Harper, 1881) – saw-tooth disc, sawtooth disc^[4]
Discus catskillensis (Pilsbry, 1896) – angular disc^[4]
Discus clappi (Pilsbry, 1924) – channelled disc^[4]
Discus engonatus Shuttleworth, 1852 – extinct^[5]^[6]
Discus ganodus Mabille, 1882^{[citation needed]}
Discus gomerensis Rähle, 1994^{[citation needed]}
Discus guerinianus R. T. Lowe, 1852^{[citation needed]}
Discus kompsus J. Mabille, 1883^{[citation needed]}
Discus macclintocki F. C. Baker, 1928 – Iowa pleistocene snail, Pleistocene disc^[4]
Discus marmorensis H. B. Baker, 1932 – Marbled Disc^[4]
Discus nigrimontanus Pilsbry, 1924 – Black Mountain disc^[4]
Discus patulus (G. P. Deshayes, 1830) – domed disc^[4]
Discus putrescens (R. T. Lowe, 1861)^{[citation needed]}
Discus retextus Shuttleworth, 1852^[6]
Discus scutula Shuttleworth, 1852^[7]
Discus selenitoides (Pilsbry, 1890) – file disc^[4]
Discus shimekii (Pilsbry, 1890) – Striate Disc^[4]
Discus textilis Shuttleworth, 1852 – extinct^[6]
Discus whitneyi (Newcomb, 1864) – Forest Disc^[4]

^ 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.
^ ^a ^b ^c "Genus summary for Discus". AnimalBase, last modified 15 january 2009, accessed 13 January 2011.
^ ^a ^b ^c "Species in genus Discus (n=3). AnimalBase, accessed 13 January 2011.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l "Discus Fitzinger, 1833". accessed 13 January 2011.
^ Alonso R. & Ibanez M. (1996). Discus engonatus. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. <www.iucnredlist.org>. Downloaded on 13 January 2011.
^ ^a ^b ^c Fontaine B., Bouchet P., Van Achterberg K., Alonso-Zarazaga M. A., Araujo R. et al. (2007). "The European union’s 2010 target: Putting rare species in focus." Biological Conservation 139: 167–185. Table 2 on p. 173. doi:10.1016/j.biocon.2007.06.012. PDF.
^ Alonso R. & Ibanez M. (1996). Discus scutula. 2006 IUCN Red List of Threatened Species. Archived 27 June 2014 at the Wayback Machine Downloaded on 6 August 2007.