Cirsonella weldii
| Cirsonella weldii | |
|---|---|
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| Drawing with two views of a shell of Cirsonella weldii | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Skeneidae |
| Genus: | Cirsonella |
| Species: | C. weldii
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| Binomial name | |
| Cirsonella weldii (Tenison-Woods, 1877)[1]
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| Synonyms[2] | |
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Cirsonella weldii, with the common name of the shiny liotia, is a species of sea snail, a marine gastropod mollusk in the of family Skeneidae.[2]
Description
[edit]The diameter of the shell attains 2 mm. The shining, white shell has a globosely turbinate shape. It is narrowly umbilicated, semi-opaque, and smooth. The four whorls are convex. The body whorl is large and rounded at the periphery. The aperture is circular. It's peristome is continuous and slightly thickened on the columellar margin.[3]
(Original description by Charles Hedley as Cirsonella naticoides) The height of the shell attains 2.35 mm, its diameter 3 mm. This is a small, solid, cream-colored shell with a turbinate shape. The four rounded whorls contain no sculpture. The surface is smooth and polished, in contrast with most species in this genus which are cancellate. The umbilicus is deep and narrow, its margin a faint basal funicle. The aperture is entire circular, double-edged, on its right lower margin the low arched butt-end of the basal funicle, then a broad thick callus tongue. This is probably marking the termination of a second inner funicle, and reaching half-way across the umbilicus. Lastly there is a similar but smaller callus pad laid upon the preceding whorl. The double basal funicle is remarkable. The inner funicle is swallowed by the umbilicus and its presence is only indicated by the callus on the aperture. The outer funicle is unusually faint.[4]
Distribution
[edit]This marine species occurs off the coasts of New South Wales, Queensland, South Australia, Tasmania, and Victoria, Australia.
References
[edit]- ^ Tenison-Woods, J.E. 1876. On some new Tasmanian marine shells. Papers and Proceedings of the Royal Society of Tasmania 1876: 131-159
- ^ a b Rosenberg, G. (2012). Cirsonella weldii (Tenison-Woods, 1877). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=598299 on 2012-09-01
- ^ G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia (described as Teinostoma (Cirsonella) australe )
- ^ Records of the Australian Museum v. 6 (1905-1907) (described as Crossea naticoides)
- Angas, G.F. 1877. Descriptions of two genera and twenty species of marine shells from New South Wales. Proceedings of the Zoological Society of London 1877: 34-40, pl. 5
- Cotton, B.C. 1945. Southern Australian Gastropoda. Part 1. Streptoneura. Transactions of the Royal Society of South Australia 69(1): 150-171
- Laseron, C. 1954. Revision of the Liotiidae of New South Wales. The Australian Zoologist 12(1): 1-25, figs 1-49a
- Cotton, B.C. 1959. South Australian Mollusca. Archaeogastropoda. Handbook of the Flora and Fauna of South Australia. Adelaide : South Australian Government Printer 449 pp
External links
[edit]- World Register of Marine Species
- "Cirsonella weldii". Gastropods.com. Retrieved 15 January 2019.
