Hemilienardia homochroa

Hemilienardia homochroa
Original image of a shell of Hemilienardia homochroa
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Neogastropoda
Superfamily:	Conoidea
Family:	Raphitomidae
Genus:	Hemilienardia
Species:	H. homochroa
Binomial name
Hemilienardia homochroa Hedley, 1922
Synonyms [1]
Lienardia (Hemilienardia) homochroa(Hedley, 1922)

Hemilienardia homochroa is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. ^[1]

Description

The length of the shell attains 5 mm, its diameter 2.5 mm.

(Original description) The small, solid shell is elongate-ovate. Its colour is entire deep rose pink, except an opaque white zone which is at first one spiral broad and at last three rows broad. The shell contains eight whorls, first three and a half apical, rapidly increasing. Sculpture : The radials are twelve prominent round-backed ribs, ceasing on the base, discontinuous from whorl to whorl, and broader than their interstices. The spirals amount to sixteen on the body whorl, and to four on the penultimate whorl. They are stout close-set cords which traverse both ribs and interstices and continue on the base. There they carry large beads in continuation of the axes of the ribs. The whole surface is also microscopically shagreened. Aperture:—The mouth is vertical, contracted by the limb of the varix, the free edge of which is armed with five prominent tubercles. The columella is excavate and twisted The sinus is deep and narrow. ^[2]

This is an Australian representative of Hemilienardia malleti (Recluz, 1852) from the tropical Pacific. It is easily and definitely distinguished by having the protoconch coloured like the rest of the shell instead of being a brilliant white like that of malleti.

Distribution

This marine species occurs off Taiwan, the Philippines and Australia (Queensland, New South Wales)

References

1. MolluscaBase (2019). MolluscaBase. Hemilienardia homochroa Hedley, 1922. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=435441 on 2019-06-28
2. 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.

• Powell, A.W.B. 1966. The molluscan families Speightiidae and Turridae, an evaluation of the valid taxa, both Recent and fossil, with list of characteristic species. Bulletin of the Auckland Institute and Museum. Auckland, New Zealand 5: 1–184, pls 1–23
• Wiedrick S.G. (2017). Aberrant geomorphological affinities in four conoidean gastropod genera, Clathurella Carpenter, 1857 (Clathurellidae), Lienardia Jousseaume, 1884 (Clathurellidae), Etrema Hedley, 1918 (Clathurellidae) and Hemilienardia Boettger, 1895 (Raphitomidae), with the description of fourteen new Hemilienardia species from the Indo-Pacific. The Festivus. special issue: 2-45.

External links

• Gastropods.com: Hemilienardia homochroa
• Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.