Palaina waterhousei

Palaina waterhousei
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda; informal group Architaenioglossa
Superfamily:	Cyclophoroidea
Family:	Diplommatinidae
Genus:	Palaina
Species:	P. waterhousei
Binomial name
	Palaina waterhousei; Iredale, 1944
	Location of Lord Howe Island

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

Description[]

The pupiform shell of adult snails is 2.8–3.1 mm in height, with a diameter of 1.7 mm, with a domed spire. It is white in colour, with golden-brown apical whorls. It has widely spaced, axal ribs. The umbilicus is closed. The circular aperture has a strongly reflected lip and an operculum is present.^[2]

Habitat[]

The snail is common and widespread across the island.^[2]

References[]

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

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[iredale44-1] Iredale, Tom (1944). "The land Mollusca of Lord Howe Island". Australian Zoologist. 10 (3): 299–334.

[h&k-2] 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.

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