Haedropleura ima

Haedropleura ima
	Original image of a shell of Haedropleura ima
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Clade:	Caenogastropoda
Clade:	Hypsogastropoda
Clade:	Neogastropoda
Superfamily:	Conoidea
Family:	Horaiclavidae
Genus:	Haedropleura
Species:	H. ima
Binomial name
	Haedropleura ima; (Bartsch, 1915)
Synonyms[1]
	Cythara ima Bartsch, 1915; Haedropleura dora Thiele, 1925;

Haedropleura ima is a species of sea snail, a marine gastropod mollusk in the family Horaiclavidae.

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

Description

The length of the shell attains 8.1 mm, its diameter 3.5 mm.

(Original description) The shell is white. The protoconch contains two smooth whorls. The other whorls are moderately rounded, with closely appressed summits marked by weak, depressed, rather broad, slightly protractive axial ribs, of which 10 occur upon the first three whorls, 12 upon the fourth and penultimate. One of the ribs is decidedly thicker, forming a strong varix. This feature is common to all of our specimens. The intercostal spaces about twice as wide as the ribs and very shallow. In addition to the axial sculpture the entire surface of the spire and the base is marked by equal and almost equally spaced, closely placed, wavy, incised, spiral lines, of which about 24 occur between the sutures on the penultimate turn and about 30 upon the base of the body whorl. The sutures are ill-defined. The aperture has an acute posterior angle. The outer lip is thick within, sharp at the edge. The sinus is scarcely indicated a little distance anterior to the summit. The columella is almost straight, covered by a thin callus, which extends up on the parietal wall, forming a tubercle near the posterior angle.[2]

Distribution

This marine species occurs off Port Alfred, South Africa

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gollark: I fear that the headers could be randomly and incomprehensibly removed from existence elsewhere.

gollark: This had BETTER not be one of those ASYNCHRONOUS things.

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References

Steyn, D.G. & Lussi, M. (1998) Marine Shells of South Africa. An Illustrated Collector’s Guide to Beached Shells. Ekogilde Publishers, Hartebeespoort, South Africa, ii + 264 pp. page(s): 154

External links

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[WoRMS-1] Haedropleura ima (Bartsch, 1915). Retrieved through: World Register of Marine Species on 4 April 2010.

[2] P. Bartsch (1915), Report on the Turton collection of South African marine mollusks, with additional notes on other South African shells contained in the United States National Museum; Bulletin of the United States National Museum v. 91 (1915)