''Eucyclotoma bicarinata'' 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

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

Raphitomidae Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". '' Malacologia'' 47(1-2). . 3 ...

Description

The length of the shell is , its diameter . The white, turreted shell is elongate. It contains six

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, clathrated throughout by longitudinal and transverse elevated striae. 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 ornamented with two and the spire with one keel. The keels are very prominent, crenulated on their edge. The whorls descend obliquely from the keels to the suture. The middle of the body whorl between the keels is plane and at the sutures slightly angulated. The outer lip is expanded and on its surface radiately ridged. The

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is ...

is twisted, and recurve. The sinus is a very narrow deep slit, terminating in a round hole.G.W. Tryon (1884) Manual of Conchology, structural and systematic, with illustrations of the species, vol. VI; Philadelphia, Academy of Natural Sciences

Distribution

This marine species occurs off Kingsmill Island, Polynesia; also off Kiribati;

Réunion Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island ...

and the Philippines.

References

* Liu J.Y. uiyu(ed.)(2008). ''Checklist of marine biota of China seas''. China Science Press. 1267 pp

External links

Pease W.H. (1863 ["1862"]). Description of new species of marine shells from the Pacific Islands. Proceedings of the Zoological Society of London. (1862): 240–243
*
Gastropods.com: ''Eucyclotoma bicarinata''
{{DEFAULTSORT:Eucyclotoma Bicarinata bicarinata Gastropods described in 1863