Discus (gastropod)

Discus is a genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Discidae, the disk snails.

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[1]

Distribution

Distribution of the genus Discus include Europe, northern Asia and North America.[2]

Description

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

Species

Species in this genus include:

subgenus Discus Fitzinger, 1833

• Discus ruderatus Férussac, 1821 – type species[3]

subgenus Gonyodiscus Fitzinger, 1833

• Discus perspectivus J. C. M. von Mühlfeld, 1816[3]
• Discus rotundatus (O. F. Müller, 1774) – rotund disc[3][4]

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
• Discus gomerensis Rähle, 1994
• Discus guerinianus R. T. Lowe, 1852
• Discus kompsus J. Mabille, 1883
• 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)
• 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]

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. "Genus summary for Discus". AnimalBase, last modified 15 january 2009, accessed 13 January 2011.
3. "Species in genus Discus (n=3). AnimalBase, accessed 13 January 2011.
4. "Discus Fitzinger, 1833". accessed 13 January 2011.
5. 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.
6. 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.
7. 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.

External links