Semilaoma costata | |
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Computerized Image of Lord Howe Island | |
Scientific classification
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Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Heterobranchia |
Order: | Stylommatophora |
Family: | Punctidae |
Genus: | Semilaoma |
Species: | S. costata
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Binomial name | |
Semilaoma costata Shea & Griffiths, 2010
[1]
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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]
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]
The snail is common and widespread in the North Bay and settlement areas of the island, living in plant litter. [2]