''Antiguraleus costatus'' is a species of

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

, a marine

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Mangeliidae Mangeliidae is a monophyletic family of small to medium-sized, predatory sea snails, marine gastropod mollusks in the superfamily Conoidea. Bouchet, P. (2011). Mangeliidae P. Fischer, 1883. In: MolluscaBase (2016). Accessed through: World Regis ...

.WoRMS (2015). Antiguraleus costatus (Hedley, 1922). In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=432984 on 2017-03-05

Taxonomy

The

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms. Content The content of the registry is edited and maintained by scien ...

still accepts the name '' Guraleus wilesianus'' Hedley, 1922 as the accepted name, relying on the original description by Hedley as ''Guraleus costatus'' var. ''wilesianus'' Hedley, 1922 Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213-359, pls 42-56
/ref> However, Sealifebase accepts the name ''Antiguraleus wilesianus'' (Hedley, 1922). To complicate the matter, the

Australian Museum The Australian Museum, originally known as the Colonial Museum or Sydney Museum. is a heritage-listed museum at 1 William Street, Sydney, William Street, Sydney central business district, Sydney CBD, New South Wales. It is the oldest natural ...

records this species as ''Antiguraleus costatus'' (Hedley, 1922) with the syntype ''Guraleus costatus wilesianus'' Hedley, 1922 and accepts it as ''Antiguraleus costatus wilesianus'' (Hedley, 1922) Collections of TePapa Museum
/ref> As of 2017 there has been no authoritative revision of this group.

Description

The length of the shell attains 10 mm, its diameter 3 mm. (Original description) The small, thin shell has an elongate-ovate shape. Its colour is pale cream, with one or two faint and narrow buff zones. Itcontains 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). In nature File:Photograph and axial plane floral diagra ...

s, of which two form the

protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called " ...

. The upper whorls are glossy. The sculpture shows narrow, sharp radials, elevated riblets, becoming closer and smaller as growth proceeds, and vanishing on the base. The first adult whorl has sixteen riblets, which increase to about twenty-seven on the

body whorl The body whorl is part of the morphology (biology), morphology of the gastropod shell, 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 ...

. The base of the shell has about ten incised spiral lines. The

aperture In optics, the aperture of an optical system (including a system consisting of a single lens) is the hole or opening that primarily limits light propagated through the system. More specifically, the entrance pupil as the front side image o ...

is wide. The outer

lip The lips are a horizontal pair of soft appendages attached to the jaws and are the most visible part of the mouth of many animals, including humans. Mammal lips are soft, movable and serve to facilitate the ingestion of food (e.g. sucklin ...

is thin, not inflected, with a wide and shallow sinus.

Distribution

This marine species is endemic to

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

and occurs off

New South Wales New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...

References

* Laseron, C. 1954. ''Revision of the New South Wales Turridae (Mollusca)''. Australian Zoological Handbook. Sydney : Royal Zoological Society of New South Wales 1-56, pls 1-12.

External links

Tucker, J.K. 2004 ''Catalog of recent and fossil turrids (Mollusca: Gastropoda)''. Zootaxa 682:1-1295.
{{Taxonbar, from=Q12860305 costatus Gastropods described in 1922 Gastropods of Australia