''Microstelma'' 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 minute
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 ...
mollusk
Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...
s or
micromollusk
A micromollusc is a shelled mollusc which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine molluscs, although in addition, numerous species of land snails and freshwater molluscs also ...
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 ...
Zebinidae
Zebinidae is a family 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 ...
.
Description
(Original description in Latin) The shell is turreted-ovate with a narrow slit and features a conical
spire
A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spire ...
. The
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).
In nature
File:Photograph and axial plane floral diagra ...
s are adorned with prominent longitudinal folds. 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 oblong, extended anteriorly, and subtly channeled. The inner
lip
The lips are a horizontal pair of soft appendages attached to the jaws and are the most visible part of the mouth of many animals, including humans. Mammal lips are soft, movable and serve to facilitate the ingestion of food (e.g. sucklin ...
is thickened and nearly straight, while the outer lip is simple.
Species
Species within the genus ''Microstelma'' include:
* † ''
Microstelma arescum''
(Woodring, 1928)
* † ''
Microstelma bellardii''
O. Semper, 1865
* ''
Microstelma canaliculatum''
(E. A. Smith, 1890)
* † ''
Microstelma cepula''
(Guppy, 1866)
* ''
Microstelma columbella''
(Dall, 1881)
* ''
Microstelma daedalum''
A. Adams, 1863
* ''
Microstelma gabbi''
(Dall, 1889)
* ''
Microstelma glabratum''
(A. Adams, 1878)
* † ''
Microstelma italicum''
Tabanelli, 1994
* ''
Microstelma japonicum''
(A. Adams, 1867)
* † ''
Microstelma lapernai''
Landau, Marquet & Grigis, 2004
* † ''
Microstelma limonense''
(Olsson, 1922)
* ''
Microstelma lutaoi''
Chang & Wu, 2004
* † ''
Microstelma melanoides''
(Gabb, 1873)
* †''
Microstelma obliquecostatum''
(P. Marshall & Murdoch, 1920)
* ''
Microstelma oshikatai''
Lan, 2003
* ''
Microstelma semistriatum''
(A. Adams, 1878)
* †''
Microstelma sophiae''
Gardella & Tabanelli, 2016
* ''
Microstelma vestale''
(Rehder, 1943)
;Species brought into synonymy:
* † ''Microstelma altispira''
(O. Haas, 1942): synonym of † ''
Hemisinus altispira''
(O. Haas, 1942) (superseded combination)
* † ''Microstelma capula''
(Guppy, 1866): synonym of † ''Microstelma cepula''
(Guppy, 1866) (incorrect spelling)
* ''Microstelma concinna''
A. Adams, 1870: synonym of ''Microstelma concinnum''
A. Adams, 1870 synonym of ''
Moerchiella dorbignyi''
(A. Adams, 1853) (incorrect gender ending of specific epithet)
* ''Microstelma concinnum''
A. Adams, 1870 : synonym of ''
Moerchiella dorbignyi''
(A. Adams, 1853) (junior synonym)
* ''Microstelma daedala''
ic synonym of ''Microstelma daedalum''
A. Adams, 1863
* ''Microstelma egregia''
(Dall, 1889): synonym of ''
Costaclis egregia''
(Dall, 1889)
* ''Microstelma flava''
Okutani, 1964: synonym of ''
Punctulum flavum''
(Okutani, 1964)
* ''Microstelma formosa''
Chang & Wu, 2004: synonym of ''
Rissoina formosa''
(Chang & Wu, 2004)
* ''Microstelma glabrata''
ic synonym of ''Microstelma glabratum''
(A. Adams, 1878)
* † ''Microstelma italica''
Tabanelli, 1994: synonym of † ''
Microstelma italicum''
Tabanelli, 1994 (incorrect gender ending of specific epithet)
* ''Microstelma japonica''
(A. Adams, 1860): synonym of ''Microstelma japonicum'' (A. Adams, 1860) (incorrect gender agreement of specific epithet)
* ''Microstelma japonicus''
ic synonym of ''Microstelma japonicum''
(A. Adams, 1867)
* † ''Microstelma limonensis''
ic synonym of † ''Microstelma limonense''
(Olsson, 1922) (incorrect gender ending of specific epithet)
* ''Microstelma semistriata''
ic synonym of ''Microstelma semistriatum''
(A. Adams, 1878)
References
Ponder W. F. (1985) ''A review of the genera of the Rissoidae (Mollusca: Mesogastropoda: Rissoacea).'' Records of the Australian Museum supplement 4: 1-221* Spencer, H.G., Marshall, B.A. & Willan, R.C. 2009 Recent Mollusca. pp 196–219 in: Gordon, D.P. (Ed.), ''The New Zealand inventory of biodiversity. 1. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia.'' Canterbury University Press, Christchurch
External links
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*
*
Zebinidae
Gastropod genera
{{Zebinidae-stub