''Turbo intercostalis'', common name the ribbed turban, is a

species In biology, a species is the basic unit of Taxonomy (biology), 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 ...

of sea snail, marine gastropod

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 es ...

in the

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

Turbinidae Turbinidae, the turban snails, are a family of small to large marine gastropod molluscs in the superfamily Trochoidea.Bouchet, P. (2014). Turbinidae Rafinesque, 1815. Accessed through: World Register of Marine Species at http://www.marinespec ...

Description

The length of the shell varies between 25 mm and 80 mm. The solid, perforate shell has an ovate-conic shape. Its color pattern is green or gray, radiately flammulated with black, green or brown, sometimes unicolored. 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 flo ...

s are convex and sometimes subangulate above. They contain numerous unequal revolving

lira Lira is the name of several currency units. It is the current currency of Turkey and also the local name of the currencies of Lebanon and of Syria. It is also the name of several former currencies, including those of Italy, Malta and Israe ...

e and obsolescent incremental striae. The

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 ...

is round, the upper angle sometimes separated from the body whorl, and projecting. The base of the shell is rounded. The

columella Lucius Junius Moderatus Columella (; Arabic: , 4 – ) was a prominent writer on agriculture in the Roman Empire. His ' in twelve volumes has been completely preserved and forms an important source on Roman agriculture, together with the ...

is excavated at the umbilicus. The circular operculum contains five whorls. Its outer surface is granulose, green or olivaceous at its center, yellowish at the margins.G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
(described as ''Turbo imperialis'' Gmelin, 1791)

Distribution

This marine species occurs of Western and Southwestern Australia; in the Indian Ocean off

Chagos The Chagos Archipelago () or Chagos Islands (formerly the Bassas de Chagas, and later the Oil Islands) is a group of seven atolls comprising more than 60 islands in the Indian Ocean about 500 kilometres (310 mi) south of the Maldives archi ...

, the

Mascarene The Mascarene Islands (, ) or Mascarenes or Mascarenhas Archipelago is a group of islands in the Indian Ocean east of Madagascar consisting of the islands belonging to the Republic of Mauritius as well as the French department of Réunion. Thei ...

Basin and the Hawaiian Islands.

References

* Reeve, L.A. 1842. ''New species of the genera Trochus and Turbo''. Proceedings of the Zoological Society of London 1842: 184–186 * Menke, C.T. 1843. ''Molluscorum Novae Hollandiae Specimen in Libraria Aulica Hahniana''. Hannoverae : Libraria Aulica Hahniana pp. 1–46. * Pease, W.H. 1861. ''Descriptions of 47 new species of shells from the Sandwich Islands, in the collection of H. Cuming''. Proceedings of the Zoological Society of London 1860: 431–438 * Tomlin, J.R. le B. 1936. ''Notes from the British Museum. VII. Turbo intercostalis Menke''. Proceedings of the Malacological Society of London 22: 137–138 * Satyamurti, S.T. 1952. ''Mollusca of Krusadai Is. I. Amphineura and Gastropoda''. Bulletin of the Madras Government Museum, Natural History ns 1(no. 2, pt 6): 267 pp., 34 pls * Wilson, B.R. & Gillett, K. 1971. ''Australian Shells: illustrating and describing 600 species of marine gastropods found in Australian waters''. Sydney : Reed Books 168 pp * Cernohorsky, W.O. 1978. ''Tropical Pacific marine shells''. Sydney : Pacific Publications 352 pp., 68 pls. * Kay, E.A. 1979. ''Hawaiian Marine Shells. Reef and shore fauna of Hawaii. Section 4 : Mollusca.'' Honolulu, Hawaii : Bishop Museum Press Bernice P. Bishop Museum Special Publication Vol. 64(4) 653 pp. * Drivas, J. & M. Jay (1988). ''Coquillages de La Réunion et de l'île Maurice'' * Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp. * 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

* {{Taxonbar, from=Q7853853 intercostalis Gastropods described in 1846