Heterocithara tribulationis

Heterocithara tribulationis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Mangeliidae
Genus:	Heterocithara
Species:	H. tribulationis
Binomial name
	Heterocithara tribulationis; (Hedley, 1909)
Synonyms[1]
	Glyphostoma tribulationis Hedley, 1909 (original combination)

Heterocithara tribulationis is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.[1]

Description

The length of the shell attains 4.75 mm, its diameter 2.5 mm.

(Original description) The small, solid shell has a biconical shape and is angled at the periphery. Its colour is white or buff. It contains 6 whorls, including a small smooth two-whorled protoconch. The sculpture shows about a dozen undulatory radial ribs, equal in breadth to their rounded interstices. They arise at the suture and are most prominent on the shoulder, and fade on the base. Ascending the spire, these radials gradually diminish. About twelve small spiral threads, which traverse ribs and furrows alike, are evenly distributed between the shoulder and the anterior extremity. Finally, a secondary sculpture of fine close grains, arranged radially and spirally, is spread over the whole surface, giving a *'gritty" aspect to the shell. The aperture is narrow, protected by a strong projecting varix. The outer lip shows two or three ill-defined tubercles within. The siphonal canal is short.

The strong shoulder angle and sanded surface are the principal features.[2][3]

Distribution

This marine species is endemic to Australia and occurs off Queensland.

References

WoRMS (2009). Heterocithara tribulationis (Hedley, 1909). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=434009 on 2017-07-17
Ch. Hedley (1909), Mollusca from the Hope Islands, north Queensland; Proceedings of the Linnean Society of New South Wales v. 34 p. 458 This article incorporates text from this source, which is in the public domain.
Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213–359, pls 42-56 This article incorporates text from this source, which is in the public domain.

External links

Tucker, J.K. 2004 Catalog of recent and fossil turrids (Mollusca: Gastropoda). Zootaxa 682:1–1295.

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[WoRMS-1] WoRMS (2009). Heterocithara tribulationis (Hedley, 1909). In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=434009 on 2017-07-17

[2] Ch. Hedley (1909), Mollusca from the Hope Islands, north Queensland; Proceedings of the Linnean Society of New South Wales v. 34 p. 458 This article incorporates text from this source, which is in the public domain.

[3] Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213–359, pls 42-56 This article incorporates text from this source, which is in the public domain.