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{{short description|Species of mollusc}} {{short description|Species of mollusc}}{{Confused|Amastra moesta}}{{Speciesbox
{{Speciesbox
|image = |image =
|image_caption= Shell of ''Amastra modesta'' |image_caption= Shell of ''Amastra modesta''
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The ] is subacute, while the ] is short with smoothly curvilinear outlines. Composed of six moderately convex whorls, the shell features a well-defined, deeply impressed suture. The ] is notably ventricose. The ] is subacute, while the ] is short with smoothly curvilinear outlines. Composed of six moderately convex whorls, the shell features a well-defined, deeply impressed suture. The ] is notably ventricose.


The ] is ovate and somewhat acute at the upper end. The outer ] is sharp, unexpanded, and moderately thickened internally. The columellar fold is well-developed and distinctly opaque. <ref name="Hyatt">{{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=275|url=https://www.biodiversitylibrary.org/page/23701752 |access-date=3 December 2024}} {{source-attribution}}</ref> The ] is ovate and somewhat acute at the upper end. The outer ] is sharp, unexpanded, and moderately thickened internally. The columellar fold is well developed and distinctly opaque.<ref name="Hyatt">{{cite book |author=Hyatt, A. |author2=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=275|url=https://www.biodiversitylibrary.org/page/23701752 |access-date=3 December 2024}} {{source-attribution}}</ref>


==Distribution== ==Distribution==
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==External links== ==External links==
* {{cite journal |last1=Adams |first1=C.B. |title=Descriptions of new species of Partula and Achatinella |journal=Contributions to Conchology. |date=1851 |volume=8 |page=125 |url=https://www.biodiversitylibrary.org/page/13796539}} * {{cite journal |last1=Adams |first1=C.B. |title=Descriptions of new species of Partula and Achatinella |journal=Contributions to Conchology. |date=1851 |volume=8 |page=125 |url=https://www.biodiversitylibrary.org/page/13796539}}
* {{cite book |last1=Pfeiffer |first1=L. |title=Nomenclator heliceorum viventium. |date=1878-1881 |publisher=Fisher |location=Cassel |page=313 |pages=1-617 |url=https://biodiversitylibrary.org/page/13116067}} * {{cite book |last1=Pfeiffer |first1=L. |title=Nomenclator heliceorum viventium. |date=1878–1881 |publisher=Fisher |location=Cassel |page=313 |url=https://biodiversitylibrary.org/page/13116067}}




Latest revision as of 15:27, 26 December 2024

Species of molluscNot to be confused with Amastra moesta.
Amastra modesta
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Stylommatophora
Family: Amastridae
Genus: Amastra
Species: A. modesta
Binomial name
Amastra modesta
(C. B. Adams, 1851)
Synonyms
  • Achatinella modesta C. B. Adams, 1851 superseded combination
  • Achatinella pumila L. Pfeiffer, 1879 nomen nudum
  • Amastra (Amastra) modesta (C. B. Adams, 1851) alternative representation

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

Subspecies
  • Amastra modesta dimissa Hyatt & Pilsbry, 1911
  • Amastra modesta modesta (C. B. Adams, 1851)

Description

The length of the shell attains 13.5 mm, is diameter 7.5 mm.

The shell is relatively thick and short, ovate-conic in shape, with a dingy reddish or ash-brown coloration, often partially covered by a dark-brown epidermis. Its surface displays fine, irregular transverse striae, becoming coarser on the upper whorls, and lacks spiral striations.

The apex is subacute, while the spire is short with smoothly curvilinear outlines. Composed of six moderately convex whorls, the shell features a well-defined, deeply impressed suture. The body whorl is notably ventricose.

The aperture is ovate and somewhat acute at the upper end. The outer lip is sharp, unexpanded, and moderately thickened internally. The columellar fold is well developed and distinctly opaque.

Distribution

This species is endemic to Hawaii.

References

  1. Amastra modesta (C. B. Adams, 1851). 25 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. 275. Retrieved 3 December 2024. Public Domain This article incorporates text from this source, which is in the public domain.

External links


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