Alaginella geminata

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Alaginella geminata
Alaginella geminata 001.jpg
Shell of Alaginella geminata (holotype)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Family: Marginellidae
Genus: Alaginella
Species:
A. geminata
Binomial name
Alaginella geminata
(Hedley, 1912)
Synonyms
  • Marginella geminataHedley, 1912 (original combination)
  • Marginella weedingiCotton, 1944
  • Protoginella geminata(Hedley, 1912)
  • Protoginella weedingi(Cotton, 1944)

Alaginella geminata is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails. [1]

Contents

Description

The length of the shell attains 6 mm, its diameter 4 mm.

(Original description) The biconical shell is glossy, and solid, becoming opaque in maturity and thin and translucent in youth. Its color is uniformly white. It comprises four whorls that are flattened above the shoulder and contracted at the base. Upon maturity, the spire is covered with a callus sheet that obscures the sutures, while a thicker layer extends over the body whorl ahead of the aperture. The aperture is narrow, subrostrate anteriorly, and channeled posteriorly, ascending the previous whorl. The outer lip has a thick varix externally and approximately ten evenly spaced small denticles internally. The columella features four strong elevated folds, with the posterior fold being horizontal and situated about halfway along the aperture, and the anterior fold running into the margin of the subrostrate extremity. [2] [3]

Distribution

This marine species is endemic to Australia and occurs off New South Wales, Queensland, South Australia, Tasmania, Victoria and Western Australia [4]

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References

  1. ↑ Alaginella geminata (Hedley, 1912) . 16 July 2024. Retrieved through: World Register of Marine Species .
  2. ↑ Hedley, C. (1912). "Descriptions of some new or noteworthy shells in the Australian Museum". Records of the Australian Museum. 8 (3): 131–160. Retrieved 16 July 2024.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  3. ↑ Alaginella geminata. "description + image". Seashells of New South Wales. Des Beechley.
  4. ↑ "Alaginella geminata". Australian Faunal Directory. Australian Government. Retrieved 16 July 2024.


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