| Revision as of 19:15, 25 December 2024 editJoJan (talk | contribs)Autopatrolled, Administrators172,554 edits + description← Previous edit | Latest revision as of 07:43, 26 December 2024 edit undoWilliam Avery (talk | contribs)Autopatrolled, Extended confirmed users, Page movers, Pending changes reviewers, Rollbackers475,131 edits + taxonbar from=Q131557042 | ||
| (2 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
| {{Short description|Species of gastropod}} | {{Short description|Species of gastropod}} | ||
| {{Speciesbox | {{Speciesbox | ||
| | image = | | image = Amastra obesa 001.jpg | ||
| | image_caption = ''Amastra obesa'' shell | | image_caption = ''Amastra obesa'' shell | ||
| | taxon = Amastra obesa | | taxon = Amastra obesa | ||
| Line 23: | Line 23: | ||
| The ] is ovate and white, with the ] featuring a strong, prominent white plait. The outer ] is simple and slightly thickened on the inner side. | The ] is ovate and white, with the ] featuring a strong, prominent white plait. The outer ] is simple and slightly thickened on the inner side. | ||
| The shell is imperforate or faintly rimate, globose with a short, concavely conic ], and relatively thin. It is pale brown beneath a dull chestnut or umber cuticle, which remains intact except near the aperture. The whorls of the ], numbering about 2½, are convex and finely striated, with the last one being subtly angular and slightly perforate. | The shell is imperforate or faintly rimate, globose with a short, concavely conic ], and relatively thin. It is pale brown beneath a dull chestnut or umber cuticle, which remains intact except near the aperture. The whorls of the ], numbering about 2½, are convex and finely striated, with the last one being subtly angular and slightly perforate. | ||
| Line 29: | Line 28: | ||
| The subsequent whorls exhibit coarse, irregular wrinkles, with the ] rounded at the periphery and faintly adorned with shallow, coarse spiral striations. The aperture is small and oblique, white on the interior. The outer lip features a narrow internal rib. The columella is short, white, and adorned with an obtuse lamella. | The subsequent whorls exhibit coarse, irregular wrinkles, with the ] rounded at the periphery and faintly adorned with shallow, coarse spiral striations. The aperture is small and oblique, white on the interior. The outer lip features a narrow internal rib. The columella is short, white, and adorned with an obtuse lamella. | ||
| The entire animal is a sooty black. The upper tentacles are prominently clubbed, while the lower tentacles have light-colored tips. The surface granulations are large and pronounced. The tentacles are longer than the shell. Its movements are notably slow and cautious, exuding a timid demeanor. |
The entire animal is a sooty black. The upper tentacles are prominently clubbed, while the lower tentacles have light-colored tips. The surface granulations are large and pronounced. The tentacles are longer than the shell. Its movements are notably slow and cautious, exuding a timid demeanor.<ref>{{cite book |last1=Hyatt, A. & Pilsbry, H. A. |title=Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 21: Achatinellidae (Amastrinae). |date=1910–1911 |publisher=Conchological Department, Academy of Natural Sciences |location=Philadelphia |page=268 |url=https://www.biodiversitylibrary.org/page/23701752 |access-date=2 December 2024}} {{source-attribution}}</ref> | ||
| ==Distribution== | ==Distribution== | ||
| Line 40: | Line 39: | ||
| ==External links== | ==External links== | ||
| * {{cite journal |last1=Newcomb |first1=W. |title=Descriptions of new species of Achatinella from Sandwich Islands. |journal=Annals of the Lyceum of Natural History of New York. |date=1853 |volume=6 |page=26 |url=https://www.biodiversitylibrary.org/page/16023608}} | * {{cite journal |last1=Newcomb |first1=W. |title=Descriptions of new species of Achatinella from Sandwich Islands. |journal=Annals of the Lyceum of Natural History of New York. |date=1853 |volume=6 |page=26 |url=https://www.biodiversitylibrary.org/page/16023608}} | ||
| {{Commons category}} | {{Commons category}} | ||
| {{Taxonbar|from=Q131557042}} | |||
| ] | ] | ||
Latest revision as of 07:43, 26 December 2024
Species of gastropod
| Amastra obesa | |
|---|---|
| |
| Amastra obesa shell | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. obesa |
| Binomial name | |
| Amastra obesa Newcomb, 1853 | |
| Synonyms | |
| |
Amastra obesa is a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae.
- Subspecies
- Amastra obesa aurora Pilsbry & C. M. Cooke, 1914
- Amastra obesa obesa (Newcomb, 1853)
Description
The length of the shell attains 13 mm, its diameter 9.5 mm.
The shell is dextral, depressed-conical, and inflated, with a solid structure and pronounced striations. It is covered by a dark umber-colored epidermis. It is composed of five rounded whorls. The apex is acute, and the suture is simple yet distinctly defined.
The aperture is ovate and white, with the columella featuring a strong, prominent white plait. The outer lip is simple and slightly thickened on the inner side.
The shell is imperforate or faintly rimate, globose with a short, concavely conic spire, and relatively thin. It is pale brown beneath a dull chestnut or umber cuticle, which remains intact except near the aperture. The whorls of the protoconch, numbering about 2½, are convex and finely striated, with the last one being subtly angular and slightly perforate.
The subsequent whorls exhibit coarse, irregular wrinkles, with the body whorl rounded at the periphery and faintly adorned with shallow, coarse spiral striations. The aperture is small and oblique, white on the interior. The outer lip features a narrow internal rib. The columella is short, white, and adorned with an obtuse lamella.
The entire animal is a sooty black. The upper tentacles are prominently clubbed, while the lower tentacles have light-colored tips. The surface granulations are large and pronounced. The tentacles are longer than the shell. Its movements are notably slow and cautious, exuding a timid demeanor.
Distribution
This species is endemic to Hawai, occurring on Molokai island.
References
- "WoRMS - World Register of Marine Species - Amastra elongata (Newcomb, 1853)". www.marinespecies.org. Retrieved 2024-11-19.
- Amastra obesa (Newcomb, 1853). 25 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. 268. Retrieved 2 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. vi. Leiden: Backhuys Publishers. p. 107.
{{cite book}}: CS1 maint: multiple names: authors list (link)
External links
- Newcomb, W. (1853). "Descriptions of new species of Achatinella from Sandwich Islands". Annals of the Lyceum of Natural History of New York. 6: 26.
| Taxon identifiers | |
|---|---|
| Amastra obesa | |