''Cirsonella'' 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

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

s, marine

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 ...

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

s in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Skeneidae The Skeneidae are a speciose family of minute to small marine gastropod molluscs in the superfamily Trochoidea.Bouchet, P.; Gofas, S. (2013). Skeneidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.ph ...

.Bouchet, P.; Gofas, S. (2012). Cirsonella. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138494 on 2012-05-23

Description

(Original description by G. Angas) The minute, smooth shell is globosely turbinate. It is narrowly umbilicated. The

aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...

is circular. The continuous

peristome Peristome (from the Greek language, Greek ''peri'', meaning 'around' or 'about', and ''stoma'', 'mouth') is an anatomical feature that surrounds an opening to an organ or structure. Some plants, fungi, and shelled gastropods have peristomes. In mo ...

is slightly thickened.G. Angas, Descriptions of two genera and twenty species of marine shells from New South Wales; Proceedings of the Zoological Society of London, 1877
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Species

Species within the genus ''Cirsonella'' include: * † '' Cirsonella aedicula'' Laws, 1936 * '' Cirsonella africana'' (Bartsch, 1915) * † '' Cirsonella amplector'' Laws, 1944 * '' Cirsonella ateles'' (Dautzenberg & H. Fischer, 1896) * '' Cirsonella carinata'' (Hedley, 1903) * † '' Cirsonella congrua'' (Laws, 1941) * '' Cirsonella consobrina'' Powell, 1930 * '' Cirsonella cubitalis'' (Hedley, 1907) * '' Cirsonella densilirata''

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, 1908 * '' Cirsonella extrema'' Thiele, 1912 * '' Cirsonella floridensis'' (Dall, 1927) * † '' Cirsonella funata'' Lozouet, 1998 * '' Cirsonella gaudryi'' (Dautzenberg & Fischer H., 1896) * '' Cirsonella georgiana'' (Dall, 1927) * '' Cirsonella globosa'' (Pelseneer, 1903) * '' Cirsonella kerguelensis'' Thiele, 1912 * '' Cirsonella lata'' (Laseron, 1954) * '' Cirsonella laxa'' Powell, 1937 * '' Cirsonella maoria'' Powell, 1937 * '' Cirsonella margaritiformis'' (Dall, 1927) * '' Cirsonella microscopia'' (Gatliff & Gabriel, 1910) * '' Cirsonella ovata'' Hedley, 1899 * '' Cirsonella paradoxa'' Powell, 1937 * '' Cirsonella parvula'' Powell, 1926 * '' Cirsonella pisiformis'' Powell, 1937 * † '' Cirsonella proava'' (Marwick, 1931) * '' Cirsonella propelaxa''

Dell Dell Inc. is an American technology company that develops, sells, repairs, and supports personal computers (PCs), Server (computing), servers, data storage devices, network switches, software, computer peripherals including printers and webcam ...

, 1956 * '' Cirsonella reflecta'' Laseron, 1954 * '' Cirsonella romettensis'' (Granata-Grillo, 1877) * '' Cirsonella variecostata'' Powell, 1940 * '' Cirsonella waikukuensis'' Powell, 1937 * † '' Cirsonella waimamakuica'' Laws, 1948 * '' Cirsonella weldii'' (Tenison-Woods, 1877) * † '' Cirsonella zeornata'' Laws, 1948 ;Species brought into synonymy: * ''Cirsonella accelerans'' C. A. Fleming, 1948: synonym of '' Cirsonella variecostata'' Powell, 1940 * ''Cirsonella australis'' Angas, 1877: synonym of ''Cirsonella weldii'' (Tenison-Woods, 1877) * ''Cirsonella granum'' Murdoch and Suter, 1906: synonym of '' Lissotesta granum'' (Murdoch & Suter, 1906) * ''Cirsonella kerguelenensis'' ic synonym of '' Cirsonella kerguelensis'' Thiele, 1912 * '' Cirsonella naticoides'' (Hedley, 1907): synonym of '' Cirsonella weldii'' (Tenison Woods, 1877) * ''Cirsonella neozelanica'' Murdoch, 1899: synonym of '' Suterilla neozelanica'' (Murdoch, 1899) * ''Cirsonella perplexa'' Laseron, 1954: synonym of '' Cirsonella reflecta'' Laseron, 1954 * ''Cirsonella simplex'' Powell, 1937: synonym of '' Acremodontina simplex'' (Powell, 1937) * ''Cirsonella translucida'' May, 1915: synonym of '' Acremodontina translucida'' (May, 1915)

References

* Angas, 1877 Proceedings of the Zoological Society of London, 1877: 38 * Iredale, T. & McMichael, D.F. (1962). ''A reference list of the marine Mollusca of New South Wales''. Memoirs of the Australian Museum. 11 : 1-109 * Lozouet, P., 1998. ''Nouvelles espèces de gastéropodes (Mollusca: Gastropoda) de l'Oligocène et du Miocène inférieur d'Aquitaine (sud-ouest de la France).'' Cossmanniana 5(3-4): 61-102 * Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). ''European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification''. Collection Patrimoines Naturels, 50: pp. 180–213 * Spencer, H.; Marshall. B. (2009). ''All Mollusca except Opisthobranchia''. In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp

Description

Species

References

Further reading