Pernastela howensis
Pernastela howensis, also known as the Lord Howe pinhead snail, is a tiny species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.[2]
| Pernastela howensis | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Order: | Stylommatophora |
| Family: | Punctidae |
| Genus: | Pernastela |
| Species: | P. howensis |
| Binomial name | |
| Pernastela howensis | |
 | |
| Location of Lord Howe Island | |
Description
The trochoidal shell of the mature snail is 1.8–2.1 mm in height, with a diameter of 3–3.3 mm, and a raised spire. It is cream to pale golden-brown in colour. The whorls are shouldered and sutures impressed, with widely spaced radial ribs. It has an roundly lunate aperture, flattened on the upper side by the reflected lip, and a moderately wide umbilicus. The animal is unknown.[2]
Distribution and habitat
The snail is known only from three worn shells collected from the summit of Mount Gower in 1912, and 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). "Pernastela howensis Iredale, 1944". MolluscaBase. Flanders Marine Institute. Retrieved 2021-08-16.
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