''Curtitoma'' 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
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 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 ...
Mangeliidae
Mangeliidae is a monophyletic family of small to medium-sized, predatory sea snails, marine gastropod mollusks in the superfamily Conoidea.
Bouchet, P. (2011). Mangeliidae P. Fischer, 1883. In: MolluscaBase (2016). Accessed through: World Regis ...
.
Description
This genus was introduced by
Paul Bartsch
Paul Bartsch (14 August 1871 Tłumaczów, Tuntschendorf, Silesia – 24 April 1960 McLean, Virginia) was an American Malacology, malacologist and carcinologist. He was named the last of those belonging to the "Descriptive Age of Malacology".
E ...
in 1941 to accommodate species with a distinct anal sinus and a
protoconch
A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called " ...
sculptured with numerous fine threads, that were otherwise similar to the species in the genera ''
Oenopota''
Moerch, 1852 and ''
Propebela
''Propebela'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Mangeliidae.
Species
Species within the genus ''Propebela'' include:
* ''Propebela alaskensis'' (Dall, 1871)
* ''Propebela alitake ...
''
Iredale, 1918. The shell has an ovoid shape and is short and stubby. 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 of the
teleoconch
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium ...
are strongly tabulatedly shouldered and lack a keel at the angulation of the shoulder. The axial ribs show up strongly between the shoulder and the periphery, but disappear at the base of the shell. The spiral
sculpture
Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable sc ...
consists of incised lines on the
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 ...
and threads on the
columella
Lucius Junius Moderatus Columella (, Arabic: ) was a prominent Roman writer on agriculture in the Roman Empire.
His in twelve volumes has been completely preserved and forms an important source on Roman agriculture and ancient Roman cuisin ...
. 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 pear-shaped, decidedly channeled anteriorly and shows a feeble sinus at the shoulder.
Grammatical gender
The grammatical gender is feminine, as composed with the Greek noun τομή, an incision (gender: feminine). However often treated as neuter following Philippi (1836: 165, footnote) and others view of treating ''Pleurotoma'' as neuter. .
Species
Species within the genus ''Curtitoma'' include:
* ''
Curtitoma bartschi''
(Bogdanov, 1985)
* ''
Curtitoma becklemishevi''
Bogdanov, 1989
* ''
Curtitoma conoidea''
(Sars G. O., 1878)
* ''
Curtitoma contraria''
Bonfitto & Morassi, 2012
* ''
Curtitoma decussata''
(Couthouy, 1839)
* ''
Curtitoma delicata''
(Okutani, 1964)
* ''
Curtitoma exquisita''
(Yokoyama, 1926)
* ''
Curtitoma finmarchia''
(Friele, 1886)
* ''
Curtitoma fiora''
(Dall, 1919)
* ''
Curtitoma georgоssiani''
Merkuljev, 2017
* ''
Curtitoma hebes''
(Verrill, 1880)
* ''
Curtitoma hinae''
(Okutani, 1968)
* ''
Curtitoma incisula''
(Verrill, 1882)
* ''
Curtitoma lawrenciana''
(Dall, 1919)
* ''
Curtitoma livida''
(Møller, 1842)
* ''
Curtitoma neymanae''
Bogdanov, 1989
* ''
Curtitoma niigataensis''
Bogdanov & Ito, 1992
* ''
Curtitoma novajasemljensis''
(Leche, 1878)
* ''
Curtitoma ovalis''
(Friele, 1877)
* ''
Curtitoma piltuniensis''
(Bogdanov, 1985)
* ''
Curtitoma trevelliana''
(Turton, 1834)
* ''
Curtitoma violacea''
(Mighels & C.B Adams, 1842)
;Species brought into synonymy:
* ''Curtitoma candita''
(Yokoyama, 1926): synonym of
Oenopota candida (Yokoyama, 1926)
* ''Curtitoma hecuba''
Bartsch, 1941: synonym of ''Curtitoma incisula''
(Verrill, 1882)
* ''Curtitoma hokkaidoensis''
(Barsch, 1941): synonym of ''
Obesotoma hokkaidoensis''
(Bartsch, 1941)
* ''Curtitoma microvoluta''
(Okutani, 1964):
synonym of ''
Oenopota candida''
(Yokoyama, 1926)
* ''Curtitoma novajasemliensis''
(Leche, 1878): synonym of ''Curtitoma novajasemljensis''
(Leche, 1878)
* ''Curtitoma reticulata''
(Brown, 1827): synonym of ''Curtitoma trevelliana''
(Turton, 1834)
* ''Curtitoma trevellianum''
(Turton W., 1834): synonym of ''Curtitoma trevelliana''
(Turton, 1834)
References
* Bouchet P., Kantor Yu.I., Sysoev A. & Puillandre N. (2011) ''A new operational classification of the Conoidea''. Journal of Molluscan Studies 77: 273-308.
External links
P Bartsch. "The Nomenclatorial Status of Certain Northern Turritid Mollusks"; Proceedings of the biological Society of Washington 54, 1-14, 1941 Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1-1295.
{{Taxonbar, from=Q3176915
Gastropod genera