''Calliotropis muricata'' 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 grows to a height of 4¾ mm. The yellowish-white shell has a conical shape with a rounded but keeled periphery and a convex base. It is umbilicate. The 6

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 are convex. The nucleus is wanting. The sculpture consists on the upper two whorls, of nearly simple concentric ribs. On the next two, the ribs are crossed by two spiral lirae, producing short tubercles on the ribs, where they cross them. The last two whorls have plicae near the channelled suture, with a row of tubercles, bordering on the infrasutural sulcus. Another similar row, a little lower on the concentric ribs and a third, consists of compressed tubercles, (about 30 on the last whorl) near the base of the whorls. These tubercles, especially those of the peripheral row, are connected by spiral lirae, of which the lowest represents the keel. The convex base is sculptured by four spiral cords, of which that near the keel, bears strong, compressed tubercles. Those of the more central cord are smaller, and the innermost two are strongly beaded, the inner one borders the umbilicus. Moreover, the base is sculptured by irregular, radiating riblets and like the upper part, by microscopic striae. The funnel-shaped umbilicus is pervious, concentrically striated and plicated, and with two beaded spirals near the base. Its largest diameter is about 2/5 of the shell. The aperture is subcircular. The outer and basal margin have short plicae in the interior. The concave columella is reflected over the umbilicus, with two denticles near its base, of which the basal one is the largest. The parietal wall has a layer of enamel, connecting the margins, slightly projected over the umbilicus. Its margin is a little thickened. The interior of the apertureis inconspicuously

nacreous Nacre ( , ), also known as mother of pearl, is an organicinorganic composite material produced by some molluscs as an inner shell layer; it is also the material of which pearls are composed. It is strong, resilient, and iridescent. Nacre is ...

.Schepman M.M. (1909), The prosobranchia of the Siboga Expedition
(described as ''Solariellopsis muricata'')

Distribution

This marine species occurs off the

Sunda Islands The Sunda Islands ( id, Kepulauan Sunda) are a group of islands in the Malay Archipelago.Chisholm, Hugh, ed. (1911). "Sunda Islands" . ''Encyclopædia Britannica''. 26 (11th ed.). Cambridge University Press. They consist of the Greater Sunda ...

, Indonesia.

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=Q5022652 muricata Gastropods described in 1908