Palaina levicostulata, also known as the fine-ribbed staircase snail, is a species of staircase snail that is endemic to Australia's Lord Howe Island in the Tasman Sea.

Palaina levicostulata
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Architaenioglossa
Superfamily: Cyclophoroidea
Family: Diplommatinidae
Genus: Palaina
Species:
P. levicostulata
Binomial name
Palaina levicostulata
Location of Lord Howe Island

Description

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The conical pupiform shell of adult snails is 4.9–5.1 mm in height, with a diameter of 2.4–2.6 mm and a conical spire. It is very pale to dark golden-brown in colour, sometimes with a white peripheral band on the final whorl. It has fine, closely spaced, axal ribs. The umbilicus is closed. The circular aperture has a strongly reflected lip and an operculum is present. The animal has a white body with dark grey cephalic tentacles and black eyes.[2]

Habitat

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The snail is most common in the Settlement region, with a few records from elsewhere on the island.[2]

References

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  1. ^ Iredale, Tom (1944). "The land Mollusca of Lord Howe Island". Australian Zoologist. 10 (3): 299–334.
  2. ^ a b 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.