Amastra juddii
| Amastra juddii | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. juddii
|
| Binomial name | |
| Amastra juddii C. M. Cooke, 1917
| |
| Synonyms | |
|
Amastra (Cyclamastra) juddii C. M. Cooke, 1917 alternative representation | |
Amastra juddii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.[1]
Description
[edit]The length of the shell attains 11.5 mm, its diameter 5.5 mm.
(Original description) The shell is perforate, dextral, conic, and thin, with a nearly smooth surface irregularly sculptured by distant, blunt growth wrinkles. In its fossilized state, it has a dirty whitish coloration. The spire is conical with nearly straight outlines.
The whorls of the protoconch are worn, nearly smooth, and convex, while the subsequent whorls are slightly convex. The body whorl is large, rounded, and tapers gradually toward the base. The aperture is large, very oblique, and subquadrate in outline, with a prominently convex outer margin. It is reinforced by a thick, broad lip rib and is obtusely angled at the base of the columella, which is covered with a thick parietal callus.
The columellar fold is basal, relatively strong, and subtransverse, terminating abruptly behind the columellar margin. The umbilicus is small and cleft-like, nearly closed off by the thickened callus of the outer margin of the columella.[2]
Distribution
[edit]This species is endemic to Hawai, occurring on Kauai Island.
References
[edit]- ^ Amastra juddii C. M. Cooke, 1917. 31 December 2024. Retrieved through: World Register of Marine Species.
- ^ Cooke, C.M. (1917). "Some new species of Amastra". Occasional Papers of the Bernice P. Bishop Museum. 3 (3): 5. Retrieved 31 December 2024.
This article incorporates text from this source, which is in the public domain.
- Cooke, C.M. Jr. (1933). "New species of Amastridae". Bernice P. Bishop Museum Occasional Papers. 10 (6): 1–29.
- Cowie, R. H., Evenhuis, N. L. & Christensen, C. C. ( (1995). Catalog of the native land and freshwater molluscs of the Hawaiian Islands. vi. Leiden: Backhuys Publishers. pp. 1–248.
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