Amastra extincta
| Amastra extincta | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. extincta
|
| Binomial name | |
| Amastra extincta (L. Pfeiffer, 1856)
| |
| Synonyms | |
| |
Amastra extincta 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 16 mm, its diameter 7.5 mm
The shell is perforate, ovate-turrite, solid, and finely striate, with a chalky texture. The spire is long, tapering upwards, and acute. There are 7 whorls, which are scarcely convex, with the body whorl comprising less than one-third of the total shell length and slightly compressed around the perforation.
The aperture is slightly oblique, rhombic-oval, and angular at the base. The columellar fold is compressed and ascends almost from the base. The peristome is simple and unexpanded, with the margins connected by a thick, somewhat nodular callus. The columellar margin is dilated and free. [2]
Distribution
[edit]This species is endemic to Hawaii, occurring on Oahu island.
References
[edit]- ^ Amastra extincta(L. Pfeiffer, 1856). 17 December 2024. Retrieved through: World Register of Marine Species.
- ^ 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. 159. Retrieved 3 December 2024.
{{cite book}}: CS1 maint: multiple names: authors list (link)
This article incorporates text from this source, which is in the public domain.
- Cowie, R. H., Evenhuis, N. L. & Christensen, C. C. (1995). Catalog of the native land and freshwater molluscs of the Hawaiian Islands. Leiden: Backhuys Publishers. p. 106.
{{cite book}}: CS1 maint: multiple names: authors list (link)
External links
[edit]- Pfeiffer, L. (1856). "Descriptions of twenty-three new species of Achatinella, collected by Mr. D. Frick in the Sandwich Islands; from Mr. Cuming's collection". Proceedings of the Zoological Society of London. 23 (297): 204. Retrieved 17 December 2024.
- Hartman, W.D. (1888). "A bibliographic and synonymic catalogue of the genus Achatinella". Proceedings of the Academy of Natural Sciences of Philadelphia. 40: 54. Retrieved 17 December 2024.