Amastra textilis

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Amastra textilis
Helix textilis (MNHN-IM-2000-30770) 001.jpeg
Shell of Helix textilis (syntype at MNHN, Paris)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Amastridae
Genus: Amastra
Species:
A. textilis
Binomial name
Amastra textilis
(Quoy & Gaimard, 1825)
Hawaii Islands - Oahu.PNG
Location of Oʻahu
Synonyms
  • Achatinella (Leptachatina) textilis(Quoy & Gaimard, 1825) superseded combination
  • Achatinella ellipsoideaA. Gould, 1847 junior subjective synonym
  • Achatinella microstomaA. Gould, 1845 junior subjective synonym
  • Amastra (Metamastra) cookeiHyatt & Pilsbry, 1911 junior subjective synonym
  • Amastra (Metamastra) textilis(Quoy & Gaimard, 1825) alternative representation
  • Amastra cookeiHyatt & Pilsbry, 1911 junior subjective synonym
  • Helix textilisQuoy & Gaimard, 1825 superseded combination

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

Contents

Subspecies

Description

The length of the shell can reach 15 mm, its diameter 8.5 mm

Amastra textilis is imperforate or occasionally slightly rimate, solid, oblong-conic, and polished, with weak sculpture consisting of fine, uneven growth wrinkles. The shell's color is a rich chestnut, varying in intensity, with paler or yellow areas typically observed below the suture and around the columella. The spire is purplish-brown. In some specimens, the chestnut hue transitions to yellowish tones or even exhibits olive or greenish tints.

Certain yellow shells display numerous indistinct olive-brown spiral lines, sometimes slightly sunken. Aging shells often feature scattered golden flecks or whitish lines and dots resulting from cuticle disintegration.

The spire is characterized by convex outlines near the base, becoming straight closer to the apex. The shell consists of 5½ to 6½ whorls that are only slightly convex. The second embryonic whorl is finely and closely striate longitudinally, occasionally intersected by smooth spiral bands in some specimens. The body whorl is somewhat convex.

The aperture is small and rather oblique, with a flesh-colored interior. The outer lip is reinforced by a narrow whitish rib within the acute edge. The columellar lamella is prominent, strong, and nearly horizontal. there is a sort of gutter at the junction of the columellar and basal margins. The parietal callus is usually rather thick, but thin at the edge and transparent. [2]

Distribution

This species is endemic to Hawai, occurring on Oʻahu.

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References

  1. ↑ Amastra textilis (Quoy & Gaimard, 1825) . 29 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. 165. 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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