Amastra spaldingi

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Amastra spaldingi
Amastra spaldingi 001.jpg
Shell of Amastra spaldingi (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. spaldingi
Binomial name
Amastra spaldingi
C. M. Cooke, 1908
Synonyms

Amastra (Metamastra) spaldingiE. A. C. M. Cooke, 1908 alternative representation

Contents

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

Description

The length of the shell attains 18.9 mm, its diameter 9.6 mm.

The shell is imperforate, dextral, cylindrically ovate, and somewhat thin. It is irregularly and faintly striated with growth lines, with the third whorl distinctly and diagonally striated. The third and fourth whorls feature a distinct spiral thread just above the sutures. The first three whorls are light brown with a yellowish tinge, while the lower three are uniformly dark resinous chestnut.

The spire is subcylindrical with slightly convex outlines and has a somewhat obtuse apex. The suture is simple and barely impressed. There are 6½ whorls, increasing somewhat regularly in size. The whorls of the protoconch are slightly convex, while the rest are flatly convex. The body whorl is cylindrical and tapers gradually towards the base.

The aperture is subpyriform, bluish on the interior, and only slightly oblique. The columella is nearly straight, barely twisted, with a basal columellar fold that is small, thin, oblique, and flexuous. The outer margin of the lip is regularly curved, erect, and thin, forming a slight angle with the base of the columella. The columellar margin is thin, appressed, and adnate. [2]

Distribution

This species is endemic to Hawaii, occurring on Oahu island.

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References

  1. ↑ Amastra spaldingi C. M. Cooke, 1908 . 12 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 .
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