''Cingulina cingulata'' is a species of

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 ...

, a

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 in the family Pyramidellidae, the pyrams and their allies.WoRMS (2011). ''Cingulina cingulata'' (Dunker, 1860). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=576639 on 2011-10-26

Description

The slender, milk-white shell has an elongate-conic shape. The length of the shell measures between 7.5 mm and 10 mm. The

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 ...

contains three

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. These are large, helicoid, rather elevated, and smooth. They have their axis at a right angle to the axis of the later whorls, and are about one-fourth immersed in the first of them. The twelve, scarcely convex whorls of the teleoconch are ornamented between the sutures by three strong, moderately rounded, raised spiral keels, which are separated by channels of about the same width. The first keel is at the summit of the whorl. These raised keels are marked axially by irregular lines of growth while the depressed channels are crossed by numerous more or less equally developed and equally spaced slender axial bands. A trace of the first keel anterior to the periphery may be seen above the suture in several of the last whorls. The white interstices are striate. The periphery of the

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

is marked by the anterior edge of the third channel. The next keel anterior to this is like those between the sutures. The remainder of the short base is marked by five less strongly developed keels and channels. The space about the umbilical region has faint, wavy spiral striations. The aperture is moderately large, and suboval. The posterior angle is obtuse, slightly effuse at the junction of the outer lip and columella. The outer lip is arcuate. The columella is short, slender, and curved, with a small and very oblique fold near its insertion which scarcely shows in the aperture. The parietal wall is covered by a thin callus.

G.W. Tryon George Washington Tryon Jr. (20 May 1838 – 5 February 1888) was an American malacologist who worked at the Academy of Natural Sciences in Philadelphia. Biography George Washington Tryon was the son of Edward K. Tryon and Adeline Savid ...

, Manual of Conchology, vol. VIII p. 338; 1889

Habitat

This species is found in the following habitats: * Brackish * Marine

Distribution

This marine species occurs off the coasts of

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

, mainly the Sea of Japan.

References

External links

To World Register of Marine Species
{{Taxonbar, from=Q5120927 Pyramidellidae Gastropods described in 1860