Cirsonella naticoides

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Cirsonella naticoides
Cirsonella naticoides 001.jpg
Original drawing of a shell of Cirsonella naticoides
Scientific classification Red Pencil Icon.png
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Skeneidae
Genus: Cirsonella
Species:
C. naticoides
Binomial name
Cirsonella naticoides
(Hedley, 1907)
Synonyms
  • Crossea naticoidesHedley, C. 1907
  • Crosseola naticoidesIredale, T. & McMichael, D.F. 1962

Cirsonella naticoides is a species of very small sea snail, a marine gastropod mollusk or micromollusk in the family Skeneidae. [1]

Contents

This species is a synonym of Cirsonella weldii (Tenison Woods, 1877).

Description

(Original description by Charles Hedley) 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. [2]

Distribution

This marine species is endemic to Australia. It occurs off Victoria and in the Bass Strait.

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References

  1. ↑ Marshall, B. (2013). Cirsonella naticoides (Hedley, 1907). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=720341 on 2013-10-14
  2. ↑ Records of the Australian Museum v. 6 (1905-1907) (described as Crossea naticoides)


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