Clanculus Maugeri
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''Clanculus maugeri'' 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 ...
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 Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...
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 ...
Trochidae The Trochidae, common name top-snails or top-shells, are a family of various sized sea snails, marine gastropod molluscs in the subclass Vetigastropoda. This family is commonly known as the top-snails because in many species the shell resembles ...
, the top snails.Rosenberg, G. (2012). ''Clanculus maugeri'' (W. Wood, 1828). Accessed through:
World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialist ...
at http://www.marinespecies.org/aphia.php?p=taxdetails&id=594201 on 2012-11-23


Description

The height of the shell varies between 20 mm and 26 mm, its diameter measures 25 mm. The solid, thick shell has a conical shape carinated with nearly straight sides and is false-umbilicate. This species is more strictly conical than usual in ''Clanculus''. It has a reddish or yellowish-brown color, more or less dotted minutely with a slightly darker shade. The about 8
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 flat above The sutures are scarcely marked. The first whorls of the apex when not smooth by erosion are spirally lirate. These lirae are dotted with red. The succeeding whorls are very closely, finely granulate in spiral series. The fine granulation is nearly uniform. Its color is minutely dotted with darker and beneath usually with white. These are characters separating ''Clanculus maugeri'' from other species in this genus. 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 ...
has about 7 rows of granules above. It is carinate at the periphery and slightly deflected anteriorly. The base of the shell is nearly flat with numerous (15 to 20) close finely beaded concentric lirulae. The tetragonal
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 ...
is very oblique. The upper lip is straightened and wrinkled within. The outer and basal lips are thick, curved and crenulate within. The columella is very oblique. Its edge is denticulate, slightly tortuous above, and inserted in the center of the axis. Below it terminates in an acute or squarish narrow tooth. The parietal wall and the umbilicus are rugose, the latter bounded by a plicate-denticulate rib.H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
(described as ''Trochus maugeri'')


Distribution

This marine species is
endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to Australia and occurs in the subtidal and intertidal zone off
New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...
,
Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi ...
and Victoria


References

* Wood, W. 1828. ''Index Testaceologicus; or A Catalogue of Shells, British and Foreign, arranged according to the Linnean system''. London : Taylor Supplement, 1-59, pls 1-8. * Philippi, R.A. 1852. ''Trochidae''. pp. 233–248 in Küster, H.C. (ed). Systematisches Conchylien-Cabinet von Martini und Chemnitz. Nürnberg : Bauer & Raspe Vol. 2. * Adams, A. 1853. ''Contributions towards a monograph of the Trochidae, a family of gastropodous Mollusca''. Proceedings of the Zoological Society of London 1851(19): 150-192 * Angas, G.F. 1867. ''A list of species of marine Mollusca found in Port Jackson harbour, New South Wales and on the adjacent coasts, with notes on their habits etc.'' Proceedings of the Zoological Society of London 1867: 185-233, 912-935 * Fischer, P. 1877. ''Genres Calcar, Trochus, Xenophora, Tectarius et Risella''. pp. 115–240 in Keiner, L.C. (ed.). Spécies general et iconographie des coquilles vivantes. Paris : J.B. Baillière Vol. 11 * Watson, R.B. 1886. ''Report on the Scaphopoda and Gastropoda collected by the H.M.S. "Challenger" during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger 1873–1876'', Zoology 15(42): 756 pp., 50 pls * Whitelegge, T. 1889. ''List of the Marine and Freshwater Invertebrate Fauna of Port Jackson and the Neighbourhood.'' Journal and Proceedings of the Royal Society of New South Wales 23: 1-161 * Tate, R. & May, W.L. 1901. ''A revised census of the marine Mollusca of Tasmania''. Proceedings of the Linnean Society of New South Wales 26(3): 344-471 * Pritchard, G.B. & Gatliff, J.H. 1902. ''Catalogue of the marine shells of Victoria. Part V''. Proceedings of the Royal Society of Victoria 14(2): 85-138 * Hedley, C. 1918. ''A checklist of the marine fauna of New South Wales. Part 1.'' Journal and Proceedings of the Royal Society of New South Wales 51: M1-M120 * May, W.L. 1921. ''A Checklist of the Mollusca of Tasmania''. Hobart, Tasmania : Government Printer 114 pp. * May, W.L. 1923. ''An Illustrated Index of Tasmanian Shells''. Hobart : Government Printer 100 pp. * Iredale, T. 1924. ''Results from Roy Bell's molluscan collections''. Proceedings of the Linnean Society of New South Wales 49(3): 179-279, pl. 33-36 * Allan, J.K. 1950. ''Australian Shells: with related animals living in the sea, in freshwater and on the land.'' Melbourne : Georgian House xix, 470 pp., 45 pls, 112 text figs. * Macpherson, J.H. & Gabriel, C.J. 1962. ''Marine Molluscs of Victoria''. Melbourne : Melbourne University Press & National Museum of Victoria 475 pp * Iredale, T. & McMichael, D.F. 1962. ''A reference list of the marine Mollusca of New South Wales''. Memoirs of the Australian Museum 11: 1-109 * Wilson, B. 1993. ''Australian Marine Shells. Prosobranch Gastropods''. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408 pp. * Jansen, P. 1995. ''A review of the genus Clanculus Montfort, 1810 (Gastropoda: Trochidae) in Australia, with description of a new subspecies and the introduction of a nomen novum''. Vita Marina 43(1-2): 39-62


External links


Biodiversity Heritage Library (7 publications)

World Register of Marine Species
{{Taxonbar, from=Q5125690 maugeri Gastropods of Australia Gastropods described in 1828