Amastra metamorpha

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Amastra metamorpha
Amastra metamorpha 001.jpg
Shell of Amastra metamorpha (holotype)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Amastridae
Genus: Amastra
Species:
A. metamorpha
Binomial name
Amastra metamorpha
Pilsbry & C. M. Cooke, 1914
Synonyms

Amastra (Cyclamastra) metamorphaPilsbry & C. M. Cooke, 1914 · alternative representation

Contents

Amastra metamorpha 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 12.25 mm, its diameter 6.3 mm.

(Original description) The shell is perforate, dextral, and long-conic in shape, with a relatively thin structure. It is russet in color, with the body whorl typically exhibiting a light brownish-olive or Isabella hue, and appearing white beneath the cuticle in mature specimens. The spire is straightly conic, with convex whorls throughout.

The embryonic whorls are initially convex and delicately striated, though they become worn in adult shells. The later whorls lack luster and feature a sculpture of faint, irregular growth lines, often accompanied by a few coarse wrinkles on the body whorl.

The aperture is small and lined with a rather thick white layer in adult shells. The outer lip is sharp, edged in dark coloration, and not thickened internally. The columellar lamella is small and oblique, adding to the overall elegance of the shell's structure. [2]

Distribution

This species is endemic to Hawaii and occurs on Maui Island.

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References

  1. ↑ Amastra metamorpha Pilsbry & C. M. Cooke, 1914 . 29 November 2024. Retrieved through: World Register of Marine Species .
  2. ↑ Pilsbry, H. A. & Cooke, C. M. (1914–1916). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 23: Appendix to Amastridae, Tornatellinidae, Index to vols. XXI-XXIII. pp. i-xi. Philadelphia: Conchological Department, Academy of Natural Sciences. p. 43. Retrieved 27 November 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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