| Amastra nucleola | |
|---|---|
| |
| Amastra nucleola shells | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. nucleola |
| Binomial name | |
| Amastra nucleola (Gould, 1845) | |
| Synonyms | |
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Amastra nucleola is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Description
The length of the shell attains 11¼ mm, its diameter 6¼ mm.
The shell is solid, imperforate, and ovate-globose in shape, with a livid chestnut coloration. The apex is pale, while areas near the suture and the anterior portion exhibit a whitish hue. It consists of six whorls, which are slightly tabulate posteriorly, adding a subtle angular appearance.
The aperture is rounded, with a simple lip that remains unadorned. The columella is excavated and covered by a callus, featuring a small but distinct fold. This combination of features gives the shell a sturdy yet refined character.
This is a small, solid species characterized by a livid hue, with the apex and the area near the suture displaying a pale, whitish tone. The shell transitions to a milk-white coloration near the termination of the body whorl at the aperture, adding a delicate contrast to its overall appearance.
Distribution
This species is endemic to Hawaii, occurring on Oahu Island.
References
- Amastra nucleola (A. Gould, 1845). 26 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. 153. Retrieved 26 December 2024.
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This article incorporates text from this source, which is in the public domain.
- Yeung, N. W., Cowie, R. H., Hayes, K. A. & Strong, E. E. (2017). "Type specimens of Hawaiian land snails in the Smithsonian Institution, National Museum of Natural History, with lectotype designations". Smithsonian Contributions to Zoology. 647: 12.
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External links
- Gould, A.A. (1845). "Descriptions of species of land shells, from the Sandwich Islands, supposed to be hitherto undescribed". Proceedings of the Boston Society of Natural History. 2: 27–28. Retrieved 26 December 2024.
- Conchology.be: image