Palaina waterhousei

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.

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
Location of Lord Howe Island

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