''Clanculus undatoides'' 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 ...

, 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 undatoides'' Tenison-Woods, 1879. 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=594212 on 2012-11-23

Description

The height of the shell attains 10 mm, its diameter also 10 mm. The rather small, somewhat solid shell is turbinately conoid. It is opaque, reddish rose with indistinct purple spots. The 5½ flat

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 increase rapidly in size. They are margined below, girdled with 6 series of rounded granules, of which the lowest line is the smallest. They increase gradually in size to the suture, which is coronate and broadly canaliculate. The base is flattened, ornamented with 8 spiral lines of close rose colored granules. The rhomboid

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 ...

contains a thickened lip, which is lirate inside. The columella has two obtuse, blunt tubercles above and below, and intermediate small obsolete teeth. The narrow umbilicus is white, with a rather conspicuous white margin.H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
(described as ''Trochus undatoides'' )

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 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 ...

and Victoria.

References

* Tenison-Woods, J.E. 1879. ''On some new marine shells''. Proceedings of the Linnean Society of New South Wales 4(1): 21-24 * 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 * Iredale, T. & McMichael, D.F. 1962. ''A reference list of the marine Mollusca of New South Wales''. Memoirs of the Australian Museum 11: 1-10 * 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 (2 publications)

World Register of Marine Species
* {{Taxonbar, from=Q5125726 undatoides Gastropods of Australia Gastropods described in 1879