Amastra subrostrata

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Amastra subrostrata
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Amastridae
Genus: Amastra
Species:
†A. subrostrata
Binomial name
†Amastra subrostrata
Pfeiffer, 1859 [2]
Hawaii Islands - Oahu.PNG
Location of Oʻahu
Synonyms
  • Achatinella (Laminella) subrostrataL. Pfeiffer, 1859 superseded combination
  • Achatinella subrostrataL. Pfeiffer, 1859 superseded combination
  • Amastra (Metamastra) subrostrata(L. Pfeiffer, 1859) alternative representation

Amastra subrostrata was an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. [3]

Contents

Subspecies

Description

The length of the shell attains 15 mm, its diameter 8 mm

The shell is imperforate, dextral, ovate-conic, and solid, with an irregularly striate surface that is slightly glossy. Its coloration is brown, irregularly clouded with tawny hues.

The spire is swollen-conic with a rather acute apex and consists of six whorls. The first four whorls are barely convex, while the body whorl is rounded and accounts for about two-fifths of the total length. A nearly basal, acute, and oblique columellar lamella is present.

The aperture is slightly oblique and irregularly semi-elliptical, angular at the columella, giving it a beak-like extension. The peristome is unexpanded and white-lipped within, with the right margin slightly spreading and the columellar margin only slightly dilated and adnate. [4]

Distribution

This species was endemic to Hawai, occurring on Oʻahu.

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References

  1. ↑ Mollusc Specialist Group (1996). "Amastra subrostrata". IUCN Red List of Threatened Species . 1996: e.T997A13101221. doi: 10.2305/IUCN.UK.1996.RLTS.T997A13101221.en . Retrieved 14 November 2021.
  2. ↑ "WoRMS - World Register of Marine Species - Amastra subrostrata (L. Pfeiffer, 1859)". www.marinespecies.org. Retrieved 2024-11-19.
  3. ↑ Amastra subrostrata (L. Pfeiffer, 1859) . 28 December 2024. Retrieved through: World Register of Marine Species .
  4. ↑ Hyatt, A. & Pilsbry, H. A. (1910–1911). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 21: Achatinellidae (Amastrinae). Philadelphia: Conchological Department, Academy of Natural Sciences. p. 174. Retrieved 3 December 2024.{{cite book}}: CS1 maint: multiple names: authors list (link)PD-icon.svg This article incorporates text from this source, which is in the public domain .
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