''Tibersyrnola bacillum'' 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
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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 bacillum (Pilsbry, 1901). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=739236 on 2015-04-16]
Description
The length of the shell varies between 5.5 mm and 12 mm.
The slender shell has a rod-like shape. It has a particular type of coloration. It is marbled reddish-brown and white, with a narrow band of alternate brown and white spots revolving midway between
sutures and on the middle of the upper surface 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 ...
, which has a white peripheral belt. This coloring is
sometimes very faint. 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).
Whorls in nature
File:Photograph and axial plane floral ...
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 ...
stands obliquely on edge, the very short
spire inclined downward. The 12½ or 13 subsequent whorls of the
teleoconch are flat, and separated by deeply cut sutures. They are sculptured with faint growth lines and an impressed line revolving below the suture. Some very faint spirals show elsewhere in certain lights. The periphery is rounded. The base of the shell is convex and subperforate. The
aperture is small and narrowly ovate. The
columella bears a single strong fold.
H. Pilsbry (1901), New Mollusca from Japan, The Loo Choo Islands, Formosa and The Philippines; Proceedings of the Academy of Natural Sciences of Philadelphia
/ref>
Distribution
This marine species occurs in the Pacific Ocean 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 ...
and the Philippines.
References
* Higo, S., Callomon, P. & Goto, Y. (1999). ''Catalogue and bibliography of the marine shell-bearing Mollusca of Japan. Osaka''. : Elle Scientific Publications. 749 pp
* Okutani T., ed. (2000) ''Marine mollusks in Japan.'' Tokai University Press. 1173 pp.
page(s): 707
External links
To World Register of Marine Species
*
{{Taxonbar, from=Q7663422
Pyramidellidae
Gastropods described in 1901