''Turbo setosus'', common name the rough turban, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

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 ...

, 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 Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Turbinidae. * Taxonomic status: Some authors place the name in the subgenus ''Turbo (Marmarostoma)''

Description

The length of the shell varies between 22 mm and 80 mm. The solid, imperforate shell has an ovate-pointed shape. Its color pattern is whitish, or greenish, maculated with brown and olive. The conic

spire A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spires are ...

is acute. The 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 are convex, striate and spirally lirate. The ridges are unequal, wider than the interspaces, frequently with interstitial lirulae. The large

aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An opt ...

lis oval and white within. The outer lip is frequently green-tinged and is fluted. The arcuate columella is deflexed and dilated at its base. The circular operculum is flat or slightly concave within. It contains four whorls and a subcentral apex. The outer surface is convex, brown, coarsely granulose in the middle, paler and more finely granular at the margins.G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
/ref>

Distribution

This species occurs in the Indian Ocean off

Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...

, the Mascarene Basin and

Mauritius Mauritius ( ; french: Maurice, link=no ; mfe, label=Mauritian Creole, Moris ), officially the Republic of Mauritius, is an island nation in the Indian Ocean about off the southeast coast of the African continent, east of Madagascar. It incl ...

; in the Central and Southwest Pacific; off Australia.

References

Notes

* Hedley, C. (1899). ''The Mollusca of Funafuti. Part 1. Gastropoda''. Australian Museum Memoires. 3 (7) * Allan, J., 1950. ''Australian Shells: with related animals living in the sea, in freshwater and on the land''. Georgian House, Melbourne. xix 470 pp * Demond, J., 1957. ''Micronesian reef associated gastropods''. Pacific Science, 11(3):275–341 * Salvat, B. & Rives, C. (1975). ''Coquillages de Polynésie. Papeete - Tahiti :'' les editions du pacifique. pp. 1–391 * Drivas, J. & M. Jay (1988). ''Coquillages de La Réunion et de l'île Maurice'' * Alf A. & Kreipl K. (2003). ''A Conchological Iconography: The Family Turbinidae, Subfamily Turbininae, Genus Turbo''. Conchbooks, Hackenheim Germany. * Williams, S.T. (2007). ''Origins and diversification of Indo-West Pacific marine fauna: evolutionary history and biogeography of turban shells (Gastropoda, Turbinidae).'' Biological Journal of the Linnean Society, 2007, 92, 573–592

External links

* {{DEFAULTSORT:Turbo setosus setosus Gastropods described in 1791 Taxa named by Johann Friedrich Gmelin