Circumstella devexa

Circumstella devexa is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.[1]

Circumstella devexa
Original drawing with three views of a shell of Circumstella devexa
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Liotiidae
Genus: Circumstella
Species:
C. devexa
Binomial name
Circumstella devexa
(Hedley, 1901)
Synonyms
  • Liotia devexa Hedley, 1901
  • Liotia walkeri Sowerby III, 1908

Description

(Original description by Charles Hedley) The height of the shell attains 3.3 mm. The very solid, widely umbilicate shell has a turbinate shape with the whorls in transverse section nearly square. The colour of the dull shell is creamy white. It contains four whorls. The upper two whorls are unsculptured, the last descending steeply and suddenly. The whole surface is densely covered by fine, close, radiating threads. The periphery is flattened, with a keel at the upper and lower angles, the superior crenulated. Outside the deeply impressed suture runs a row of denticules. The base of the shell is flattened. The abrupt margin of the aperture is scalloped. The very oblique aperture is semilunate with two massive lips, one within the other.[2]

Distribution

This marine species occurs off the Northern Territory and Queensland, Australia

References
  1. Marshall, B. (2013). Circumstella devexa (Hedley, 1901). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719263 on 2013-08-2
  2. Hedley, C. 1901. Studies on Australian Mollusca. Part IV. Proceedings of the Linnean Society of New South Wales 26: 16-25 (8, pl. 2, figs 4-6)
  • Sowerby, G.B. III,1908. Descriptions of eight new species of marine mollusca. Proceedings of the Malacological Society of London 8: 16-19, pl. 11 [16, pl. 1, fig. 2]
  • Jenkins, B.W. 1984. Northern Australian Liotiidae. Australian Shell News 48: 8-9
  • Wilson, B. 1993. Australian Marine Shells. Prosobranch Gastropods. Kallaroo, Western Australia : Odyssey Publishing Vol. 1 408
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