Blue periwinkle | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
(unranked): | clade Caenogastropoda clade Hypsogastropoda clade Littorinimorpha |
Superfamily: | Littorinoidea |
Family: | Littorinidae |
Genus: | Nodilittorina |
Species: | N. unifasciata |
Binomial name | |
Nodilittorina unifasciata (Grey, 1826) |
The Blue Periwinkle or Nodilittorina unifasciata Grey, 1826, is a species of small sea snail, a marine gastropod mollusk in the family Littorinidae, the periwinkles.
The common name of this snail derives from the pale bluish-grey color of the shell, which ranges in adult size from 10 mm to 16 mm.
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This common periwinkle lives in Australia and New Zealand.Is also commonly found in South Pacific Islands such as Norfolk Island.
This species of periwinkle lives in the splash zone and high intertidal zone, where it is found in clusters of individuals. The blue periwinkle grazes on lichen and algae. This small snail is eaten by crabs and birds.