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[1]

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]

Description

Discus species have small or medium shell 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^{[citation needed]}
• Discus gomerensis Rähle, 1994^{[citation needed]}
• Discus guerinianuss 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]

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. ^ ^{a b c} "Genus summary for Discus". AnimalBase, last modified 15 january 2009, accessed 13 January 2011.
3. ^ ^{a b c} "Species in genus Discus (n=3). AnimalBase, accessed 13 January 2011.
4. ^ ^{a b c d e f g h i j k l} "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. ^ ^{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 the page 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. Downloaded on 6 August 2007.

External links