Graciliclava costata

Graciliclava costata
	Original image of a shell of Graciliclava costata
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Horaiclavidae
Genus:	Graciliclava
Species:	G. costata
Binomial name
	Graciliclava costata; (Hedley, 1922)
Synonyms
	Austroclavus costatus. Cotton, B.C. 1947; Clavus costatus Hedley, 1922;

Graciliclava costata is a species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.

It was previously included within the family Turridae.^[1]

Description

The length of the shell varies between 5 mm and 10 mm.

(Original description) The small, solid and compact shell has an ovate-elongate shape. Its colour is dull white, the summit buff-yellow, base anterior to the insertion of the lip pale orange-yellow. Along the suture are irregular chocolate splashes. The shell contains 7 whorls including a protoconch of two depressed whorls. Its sculpture consists of eight thick and prominent ribs to a whorl These descend the shell vertically and continuously; on the base they are slightly flexed, and each terminates anteriorly in a bead. Both ribs and interstices are engraved by very minute and dense spiral striae. The snout is traversed by a few coarse spirals, which cease at the bead row. On the smooth glossy protoconch is a pronounced median keel, which ends abruptly at the topmost rib. The aperture is pyriform and produced into a short, wide, open siphonal canal. Behind the lip is a prominent varix which, rising above the suture, fills an intervariceal space on the preceding whorl. A substantial callus sheet spreads on the inner lip, and a tubercle is formed near the right insertion. Just in front of the siphonal canal is a slight insinuation of the outer lip.^[2]

Distribution

This marine species occurs off Queensland, Australia and the Philippines

References

^ ^a ^b Graciliclava costatus (Hedley, 1922). Retrieved through: World Register of Marine Species on 4 April 2010.
^ Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213–359, pls 42–56

Cotton, B.C. 1947. Australian Recent and Tertiary Turridae. Adelaide : Field Naturalist's Section of the Royal Society of South Australia. Conchology Club Vol. 4 pp. 1–34.
Wells F.E. (1991) A revision of the Recent Australian species of the turrid genera Clavus, Plagiostropha, and Tylotiella (Mollusca: Gastropoda). Journal of the Malacological Society of Australia 12: 1–33
Wilson, B. 1994. Australian Marine Shells. Prosobranch Gastropods. Kallaroo, WA : Odyssey Publishing Vol. 2 370 pp.

External links

[WoRMS-1] Graciliclava costatus (Hedley, 1922). Retrieved through: World Register of Marine Species on 4 April 2010.

[2] Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213–359, pls 42–56

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