| Semilaoma costata | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Order: | Stylommatophora |
| Family: | Punctidae |
| Genus: | Semilaoma |
| Species: | S. costata |
| Binomial name | |
| Semilaoma costata Shea & Griffiths, 2010[1] | |
 | |
| Location of Lord Howe Island | |
Semilaoma costata, also known as the coarse-ribbed pinhead snail, is a tiny species of land snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.[2]
Description
The subdiscoidal shell of the mature snail is 0.7–0.8 mm in height, with a diameter of 1.3–1.5 mm, and a low to flat spire. It is pale yellow to white in colour. The whorls are rounded to shouldered. The sutures are impressed, with moderately closely-spaced radial ribs. It has an ovately lunate aperture, and a moderately wide umbilicus. The animal is unknown.[2]
Distribution and habitat
The snail is common and widespread in the North Bay and settlement areas of the island, living in plant litter.[2]
References
- ↑ Stanisic, J; Shea, M; Potter, D; Griffiths, O (2010). Australian land snails. Volume 1. A field guide to eastern Australian species. Brisbane: Queensland Museum.
- 1 2 3 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.
- "Semilaoma costata Shea & Griffiths, 2010". MolluscaBase. Flanders Marine Institute. 2021. Retrieved 2021-08-17.
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