Charopinesta sema
Charopinesta sema, also known as the Blackburn Island pinhead snail, is a species of land snail that is endemic to Australia's Lord Howe Island group in the Tasman Sea.[2]
| Charopinesta sema | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Order: | Stylommatophora |
| Family: | Punctidae |
| Genus: | Charopinesta |
| Species: | C. sema |
| Binomial name | |
| Charopinesta sema | |
 | |
| Location of Lord Howe Island | |
Description
The depressedly turbinate to discoidal shell of the mature snail is 1.1 mm in height, with a diameter of 1.8 mm, and a low, stepped spire. It is pale golden in colour. The whorls are rounded, with deeply impressed sutures and moderately spaced radial ribs. It has a roundedly lunate aperture and widely open umbilicus. [2]
Distribution and habitat
This extremely rare snail is known from a single empty shell from Blackburn Island. It may be extinct.[2]
References
- Iredale, Tom (1944). "The land Mollusca of Lord Howe Island". Australian Zoologist. 10 (3): 299–334.
- Hyman, Isabel; Köhler, Frank (2020). A Field Guide to the Land Snails of Lord Howe Island. Sydney: Australian Museum. ISBN 978-0-9750476-8-2.
- MolluscaBase eds (2021). "Charopinesta sema Iredale, 1944". MolluscaBase. Flanders Marine Institute. Retrieved 2021-08-12.
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