''Turbo jourdani'' , common name the Jourdan's 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 ...

. * Taxonomic status: Some authors place the name in the subgenus ''Turbo (Dinassovica)'' Turbo jourdani 2

Description

The length of the shell varies between 75 mm and 240 mm. The large, solid, imperforate shell has an ovate-conic shape with an acute spire. The color of its epidermis is castaneous or olive. The eight

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 rounded and increase regularly in size. The upper ones are 1-3-carinate, the lower transversely obsoletely lirate. The body whorl is large, ventricose, descending, nearly smooth, or with wide spiral ribs. The circular

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 white within. The outer

lip The lips are the visible body part at the mouth of many animals, including humans. Lips are soft, movable, and serve as the opening for food intake and in the articulation of sound and speech. Human lips are a tactile sensory organ, and can be ...

is thin. The arcuate

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 not expanded at its base.G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia
(described as ''Turbo imperialis'' Gmelin, 1791)

Distribution

This marine species is known from Geraldton, Western Australia, to central South Australia.

References

* Kiener, L.C. 1839. ''Nouvelle espèce de Mollusque du genre Turbo de Linné''. Revue Zoologique par la Société Cuvierienne 1839: 324–325 * Verco, J.C. 1908. ''Notes on South Australian marine Mollusca with descriptions of new species. Part IX''. Transactions of the Royal Society of South Australia 32: 338–3 * Iredale,T. 1937. ''Middleton and Elizabeth Reef, South Pacific Ocean''. The Australian Zoologist 8: 232–261 * Cotton, B.C. 1959. ''South Australian Mollusca. Archaeogastropoda''. Handbook of the Flora and Fauna of South Australia. Adelaide : South Australian Government Printer 449 pp. * 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=Q7853856 jourdani Gastropods of Australia Gastropods described in 1839