''Calliotropis limbifera'' 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

Eucyclidae Eucyclidae is a family of gastropods in the superfamily Seguenzioidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). This family has no subfamilies. Genera Genera within the family Eucyclidae include: * '' Amberley ...

Description

(Original description by Schepman) The shell reaches a length of 8 mm. The yellowish-white, the conical shell is moderately depressed and slightly convex below. It has a very strong, rounded keel, and is widely umbilicate. The spire consists of

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. The nucleus is smooth. The upper whorls contain concentric ribs and traces of one or two spiral lirae, producing small tubercles on the ribs. The whorls are flattened near the suture. Above the upper row of tubercles, this depression is roughened by small lamellae. The lower part of the whorls is slightly convex. On the lower whorls, the sculpture consists of a row of rather strong tubercles at some distance from the suture, the flattened space between suture and tubercles is also lamelliferous. The second row of smaller tubercles makes its appearance, and becomes more conspicuous on 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 ...

. At some distance from the lower suture, a spiral rib, with inconspicuous beads, is crossed by irregular, waved lamellae, which spread on the large keel. This keel is flat above, rounded at its periphery, and adorned by sharp, compressed folds, which make it crenulated. The base of the shell is sculptured by five beaded spirals, of which the outer one, placed at some distance from the margin, and the most central one, bordering the umbilicus are double. The whole base is covered by radiating very oblique riblets. The funnel-shaped umbilicus is pervious. It has two spiral lirae, of which the lower one is beaded, and radiating riblike striae. Its largest diameter is about of the base. The aperture is rhombic. The convex, outer margin is rather thin, internally lirate, with short folds between the lirae. The convex basal margin is short, and internally with a few lirae. The broad columella is concave, with a conspicuous fold near the base and a small denticle above it. Its upper part is connected to the outer margin by a conspicuous layer of enamel, with thickened margin, and a free ear-shaped projection, covering part of the umbilicus.Schepman M.M. (1909), The prosobranchia of the Siboga Expedition
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Distribution

This species occurs in the

Sulu Sea The Sulu Sea ( fil, Dagat Sulu; Tausug: ''Dagat sin Sūg''; Chavacano: ''Mar de Sulu''; Cebuano: ''Dagat sa Sulu''; Hiligaynon: ''Dagat sang Sulu''; Karay-a: ''Dagat kang Sulu''; Cuyonon: ''Dagat i'ang Sulu''; ms, Laut Sulu) is a body o ...

, the Philippines; also off

New Caledonia ) , anthem = "" , image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg , map_alt = Location of New Caledonia , map_caption = Location of New Caledonia , mapsize = 290px , subdivision_type = Sovereign st ...

References

* Vilvens C. (2007) ''New records and new species of Calliotropis from Indo-Pacific''. Novapex 8 (Hors Série 5): 1–72

External links

{{Taxonbar, from=Q5022643 limbifera Gastropods described in 1908