''Tibersyrnola cinnamomea'' 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
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* Marine pollution
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* ...
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.
[Rosenberg, G. (2015). Tibersyrnola cinnamomea (A. Adams, 1863). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=739237 on 2015-04-16]
Description
The slender, yellowish-brown shell has an elongate-conic shape. Its outline is almost rectilinear. It has a polished appearance. The length of the shell measures 4.2 mm. The 2½
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 of 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 ...
are smooth, rather large, helicoid, and moderately elevated. Their axis is at a right angle to the axis of the later whorls and about one-fourth immersed in the first of them. The periphery of the protoconch extends slightly beyond the outline of the
spire on the left side. The eight whorls of the
teleoconch are flattened and quite high between the
sutures. They are separated by slight sutures marked only by faint lines of growth and numerous extremely fine and closely placed spiral striations. The periphery and the base 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 well rounded, the latter rather short. The
aperture is small, and suboval. The posterior angle is narrow and acute. The
outer li is thin. The
columella is short, curved, and moderately strong. It is marked by an inconspicuous oblique fold near its insertion. The parietal wall is covered by a thin callus.
P. Bartsch (1906), ''Notes on Japanese, Indo-Pacific and American Pyramidellidae''; Proceedings of the U.S. National Museum vol. XXX no. 1452
/ref>
Distribution
This marine species occurs off 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 ...
.
References
* Okutani T., ed. (2000) ''Marine mollusks in Japan''. Tokai University Press. 1173 pp. page(s): 707
External links
World Register of Marine Species
{{Taxonbar, from=Q7663450
Pyramidellidae
Gastropods described in 1862