Leiopyrga octona

Leiopyrga octona, common name the eight-ringed weed shell, is a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[1]

Leiopyrga octona
Original drawing of a shell of Leiopyrga octona
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Clade: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Trochidae
Genus: Leiopyrga
Species:
L. octona
Binomial name
Leiopyrga octona
Tate, 1891

Description

The height of the shell attains 10 mm, its diameter 4.5 mm. The thin, turreted shell is narrowly perforate. It is shining, white with oblique axial or zigzag pinkish lines. The 8½ whorls are moderately convex and separated by a linear suture. The 2½ rufous, apical whorls are turbinately depressed, and they are smooth. The first two spire whorls are smooth, the third showing faint spiral lines which increase in strength with the revolution of the spire. The anterior whorls show eight to ten equal and equidistant, rounded, and rather depressed cinguli, which are a little wider than the furrows. The body whorl is equally and regularly cingulated. The base of the shell is convex. The aperture is oval. The thin outer lip is crenated on the margin. The thin columella is slightly thickened above and attenuates abruptly to the front. it is not perceptibly reflected. The umbilical groove is smooth.[2]

Distribution

This marine species is endemic to Australia and occurs off South Australia, West Australia and Victoria.

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References
  1. Marshall, B. (2014). Leiopyrga octona. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719247 on 2014-07-08
  2. Tate, R. 1891. Descriptions of new species of Australian Mollusca, recent and fossil. Transactions of the Royal Society of South Australia 14: 257-265
  • Verco, J.C. 1904. Notes on South Australian marine Mollusca with descriptions of New Species. Part I. Transactions of the Royal Society of South Australia 28: 135-145
  • Cotton, B.C. 1959. South Australian Mollusca. Archaeogastropoda. Handbook of the Flora and Fauna of South Australia. Adelaide : South Australian Government Printer 449 pp.
  • "Leiopyrga octona octona". Gastropods.com. Retrieved 16 January 2019.
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