Aegista tapeina

Aegista tapeina
	Shell of Aegista tapeina (specimen at Naturalis Biodiversity Center)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Camaenidae
Subfamily:	Bradybaeninae
Tribe:	Aegistini
Genus:	Aegista
Species:	A. tapeina
Binomial name
	Aegista tapeina; (W. H. Benson, 1836)
Synonyms
	Aegista (Plectotropis) tapeina (W. H. Benson, 1836) (unaccepted combination); Helix (Plectotropis) tapeina W. H. Benson, 1836 (unaccepted combination); Helix tapeina W. H. Benson, 1836 (original combination); Plectotropis tapeina (W. H. Benson, 1836);

Aegista tapeina is a species of air-breathing land snails, a terrestrial pulmonate gastropod in the family Camaenidae.^[1]

Description

The diameter of the shell varies between 7.7 mm and 8.1 mm.

The shell is moderately large, exhibiting a robust, greenish hue. It is subdepressedly conoid and rather lenticular. It is widely umbilicate. The shell features faint oblique stripes with spiral markings that are not prominently defined. The spire is low and conoid. The shell comprises 6-7 whorls each somewhat flattened above. The body whorl is bluntly angulate at the periphery, rounded below, rounding out below and forming a subtle angle around the umbilicus before gently sloping downward. The aperture is slightly slanted and semicircular. The thin peristome is slightly turned outward. The columellar margin is simple and very slightly reflected.

The species displays variation in both the height of the spire and the angularity of the body whorl. Distinguishing itself from the aforementioned characteristics, it typically exhibits a narrower umbilicus, measuring less than 5 mm in width, while also boasting a slightly taller stature and a more pronounced angularity. ^[2]

Distribution

This species occurs in Myanmar, India, China and Java, Indonesia.

References

^ ^a ^b MolluscaBase (2024). "Aegista tapeina (W. H. Benson, 1836)". World Register of Marine Species. Retrieved 22 May 2024.
^ G.W. Tryon, Manual of conchology. Second series: Pulmonata vol. II This article incorporates text from this source, which is in the public domain.

Preece, R. C., White, T. S., Raheem, D., Ketchum, H., Ablett, J., Taylor, H., Webb, K., & Naggs, F. 2022. William Benson and the golden age of malacology in British India: biography, illustrated catalogue and evaluation of his molluscan types. Tropical Natural History, Supplement 6, Chulalongkorn University. pp.4

External links

[WoRMS-1] MolluscaBase (2024). "Aegista tapeina (W. H. Benson, 1836)". World Register of Marine Species. Retrieved 22 May 2024.

[2] G.W. Tryon, Manual of conchology. Second series: Pulmonata vol. II This article incorporates text from this source, which is in the public domain.

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