Amastra conica

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Amastra conica
Amastra conica 001.jpg
Shell of Amastra conica
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Amastridae
Genus: Amastra
Species:
A. conica
Binomial name
Amastra conica
Baldwin, 1906
Synonyms

Amastra (Amastrella) conicaBaldwin, 1896 alternative representation

Contents

Amastra conica is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. [1]

Subspecies

Description

The length of the shell attains 15.5 mm, its diameter 8 mm.

(Later supplemental description by Hyatt, A. & Pilsbry, H. A.) The shell is a fossil specimen. It is dextral and minutely perforated, with a thin, elongately conical shape and an acute apex. Its surface is delicately sculpted with fine growth lines, while the apical whorls exhibit radiating sulcations. The original coloration of the living shell remains unknown. Comprising seven convex whorls, the shell features a well-defined suture. The aperture is oblique and oval, framed by a simple, very thin peristome. The columella ends in a subtly developed fold. [2]

The species was discovered within deposits of fossilized shells at a location known as Mana. The likelihood of living specimens of this species persisting to the present day or within any recent period is exceedingly low. [3]

Distribution

This species is endemic to Hawaii, occurring on the Lanai island.

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References

  1. ↑ Amastra conicaBaldwin, 1906 . 7 December 2024. Retrieved through: World Register of Marine Species .
  2. ↑ 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. 240. 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 .
  3. ↑ Baldwin, D.D. (1906). "Description of new species of Achatinellidae from the Hawaiian Islands". The Nautilus. 19 (12): 137–138. Retrieved 7 December 2024.PD-icon.svg This article incorporates text from this source, which is in the public domain .
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