''Sinezona'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of minute

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s or

micromollusk A micromollusk is a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also ...

s in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Scissurellidae, the little slit shells.WoRMS : Sinezona; accessed : 21 October 2010
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Description

The shell has turbinate or depressed turbinate form. The anal fissure is closed, forming a foramen in the outer wall of the

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An opt ...

. The slit fasciole is shorter, not over 1½

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

s in length. ''Sinezona'' is a ''

Scissurella ''Scissurella'' is a genus of minute sea snails, marine (ocean), marine gastropod molluscs in the family (biology), family Scissurellidae, the small slit snails. Species According to the World Register of Marine Species (WoRMS), the following sp ...

'' in which the anal slit becomes closed in the adult, and transformed into an oblong perforation like one of the holes of a '' Haliotis''.

Distribution

This marine genus occurs worldwide.

Species

Species in the genus ''Sinezona'' include: * '' Sinezona bandeli'' Marshall, 2002 * '' Sinezona beddomei'' (Petterd, 1884) * '' Sinezona brevis'' (Hedley, 1904) * '' Sinezona brucei'' Geiger, 2012 * '' Sinezona calumnior'' Geiger, 2012 * '' Sinezona carolarum'' Geiger & McLean, 2010 * '' Sinezona chilensis'' Geiger, 2012 * ''

Sinezona cingulata ''Sinezona cingulata'' is a species of minute sea snail, a marine gastropod mollusk in the family Scissurellidae. Description The size of the extremely minute shell varies between 0.6 mm and 1 mm. The white, fragile and thin shell ha ...

'' (O.G. Costa, 1861) * '' Sinezona confusa'' Rolán & Luque, 1994 * '' Sinezona costulata'' Geiger & Sasaki, 2009 * '' Sinezona danieldreieri'' Geiger, 2008 * '' Sinezona doliolum'' Herbert, 1986 * '' Sinezona enigmatica'' Geiger & B.A. Marshall, 2012 * '' Sinezona ferriezi'' (Crosse, 1867) * '' Sinezona finlayi'' (Laws, 1948) * '' Sinezona garciai'' Geiger, 2006 * † '' Sinezona geigeri'' Landau, Van Dingenen & Ceulemans, 2017 * '' Sinezona globosa'' Geiger, 2006 * † '' Sinezona haliotimorpha'' Lozouet, 1998 * '' Sinezona hawaiiensis'' Geiger & McLean, 2010 * '' Sinezona insignis'' (E.A. Smith, 1910) * '' Sinezona insularis'' Simone, 2009 * '' Sinezona iota'' (Finlay, 1926) * '' Sinezona kayae'' Geiger &

McLean MacLean, also spelt Maclean and McLean, is a Goidelic languages, Gaelic surname Mac Gille Eathain, or, Mac Giolla Eóin in Irish language, Irish Gaelic), Eóin being a Gaelic form of Johannes (John (given name), John). The clan surname is an A ...

, 2010Geiger D. L. & McLean J. H. (10 February 2010) "New species and records of Scissurellidae and

Anatomidae Anatomidae is a family of minute sea snails, marine gastropod mollusks in the clade Vetigastropoda (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Anatomidae was raised to the rank of subfamily to the rank of family ...

from the Americas (Mollusca: Gastropoda: Vetigastropoda)". ''Zootaxa'' 2356: 1-35, 24 plates
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* † '' Sinezona kondoi'' * † '' Sinezona koruahina'' (Laws, 1936) * '' Sinezona laqueus'' (Finlay, 1926) * '' Sinezona levigata'' ( Iredale, 1908) * '' Sinezona macleani'' Geiger, 2006 * '' Sinezona marrowi'' Geiger, 2012 * '' Sinezona mechanica'' Geiger & B.A. Marshall, 2012 * '' Sinezona milleri'' Geiger & Sasaki, 2009 * '' Sinezona mouchezi'' (Vélain, 1876) * '' Sinezona norfolkensis'' Geiger, 2012 * '' Sinezona pacifica'' (Oliver, 1915) * '' Sinezona pauperata'' (

Powell Powell may refer to: People * Powell (surname) * Powell (given name) * Powell baronets, several baronetcies *Colonel Powell (disambiguation), several military officers *General Powell (disambiguation), several military leaders *Governor Powell (di ...

, 1933) * '' Sinezona platyspira'' Geiger & B.A. Marshall, 2012 * '' Sinezona plicata'' (Hedley, 1899) * † '' Sinezona praecedens'' Lozouet, 1998 * '' Sinezona rimuloides'' (Carpenter, 1865) - rim scissurelle * '' Sinezona semicostata'' Burnay & Rolán, 1990 * '' Sinezona singeri'' Geiger, 2006 * '' Sinezona singulata'' (O. G Costa) * '' Sinezona subantarctica'' (Hedley, 1916) * † '' Sinezona tertia'' (Laws, 1940) * '' Sinezona wanganellica'' Geiger & B.A. Marshall, 2012 * '' Sinezona wileyi'' Geiger, 2008 * '' Sinezona zimmeri'' Geiger, 2003 ;Nomine dubia: * ''Sinezona concinna'' (G. B. Sowerby I, 1831) * ''Sinezona miranda'' (A. Adams, 1862) * ''Sinezona modesta'' (A. Adams, 1862) * ''Sinezona paumotuensis'' (Garrett, 1872) ;Species brought into synonymy: * ''Sinezona armillata'' Yaron, 1983: synonym of '' Sukashitrochus armillatus'' (Yaron, 1983) * ''Sinezona atkinsoni'' Tenison-Woods, J.E., 1877: synonym of '' Sukashitrochus atkinsoni'' (Tenison Woods, 1877) * ''Sinezona brasiliensis'' Mattar, 1987: synonym of '' Satondella brasiliensis'' (Mattar, 1987) * ''Sinezona carinata'' (Adams, A., 1862): synonym of '' Sukashitrochus carinatus'' (A. Adams, 1862) * ''Sinezona crossei'' (Folin, L. de, 1869): synonym of ''

'' (O. G. Costa, 1861) * ''Sinezona fayalensis'' (Dautzenberg, 1889): synonym of ''

'' (O. G. Costa, 1861) * ''Sinezona lobini'' Burnay & Rolán, 1990: synonym of '' Scissurella lobini'' (Burnay & Rolan, 1990) * ''Sinezona morleti'' (Crosse, 1880): synonym of '' Sukashitrochus morleti'' (Crosse, 1880) * ''Sinezona lyallensis'' (Finlay, 1927): synonym of '' Sukashitrochus lyallensis'' (Finlay, 1926) * ''Sinezona padangensis'' (Thiele, 1912): synonym of '' Sinezona ferriezi'' (Crosse, 1867) * ''Sinezona pulchra'' (Petterd, 1884):Molluscs of Tasmania: ''Sinezona pulchra''
synonym of '' Sukashitrochus pulcher'' (Petterd, 1884) * ''Sinezona redferni'' Rolán, 1996: synonym of'' Scissurella redferni'' (Rolán, 1996) * ''Sinezona tricarinata'' Yaron, 1983: synonym of '' Sukashitrochus tricarinatus'' (Yaron, 1983)

References

* Geiger D.L. (2003). ''Phylogenetic assessment of characters proposed for the generic classification of Recent Scissurellidae (Gastropoda: Vetigastropoda) with a description of one new genus and six new species frop Easter Island and Australia''. Molluscan Research 23:21-83 * Geiger D.L. (2012) ''Monograph of the little slit shells. Volume 1. Introduction, Scissurellidae. pp. 1-728. Volume 2. Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae''. pp. 729–1291. Santa Barbara Museum of Natural History Monographs Number 7

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{{Commons category Scissurellidae Extant Miocene first appearances Taxa named by Harold John Finlay