Allenoconcha retinaculum

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Allenoconcha retinaculum
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Microcystidae
Genus: Allenoconcha
Species:
A. retinaculum
Binomial name
Allenoconcha retinaculum
(Preston, 1913)
Synonyms
  • Buffetia retinaculum(Preston, 1913) (unavailable genus name)
  • Nitor retinaculumPreston, 1913 (original combination)

Allenoconcha retinaculum is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Microcystidae. [2]

Contents

Description

The height of the shell attains 1.5 mm, its diameter 3 mm.

(Original description) The small shell is conically depressed. It is thin, transparent, and slightly glossy with a yellowish-brown hue. It consists of four whorls that increase in size regularly, with the body whorl being subtly angled at the periphery. The shell is sculpted with closely spaced, oblique, arcuate folds, which are more pronounced on the later whorls. The suture is distinctly impressed. The columella margin is curved at the top, descending very obliquely, and thickened inwardly into a whitish, loop-like lamella, visible through the shell. The outer lip is sharp, and the aperture is obliquely compressed and slightly elevated. [3]

Distribution

This species is endemic to Norfolk Island.

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References

  1. ↑ Ponder, W.F.; Varman, R. (1996). "Buffetia retinaculum". IUCN Red List of Threatened Species . 1996: e.T3166A9644211. doi: 10.2305/IUCN.UK.1996.RLTS.T3166A9644211.en . Retrieved 17 November 2021.
  2. ↑ MolluscaBase eds. (2021). MolluscaBase. Allenoconcha retinaculum (Preston, 1913). Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=1421761 on 2021-02-28
  3. ↑ Preston, H. B. (1913). Characters of new genera and species of terrestrial Mollusca from Norfolk Island. The Annals and magazine of natural history; including zoology, botany, and geology. Eighth series. 12 (72): 522-538. London PD-icon.svg This article incorporates text from this source, which is in the public domain .


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