Amoria undulata

Wavy volute

Amoria undulata, Bicheno, TAS, Photo: Graham Edgar

Amoria undulata, Bass Strait, TAS, Photo: Graham Edgar

Amoria undulata, Orford, TAS, Photo: Graham Edgar

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Distribution

Temperate Australasia

Description

Considerable variation in pattern, but usually has an orange background with thin brown wavy lines down the shell. It is the only volute species commonly found living on sand in shallow water around the southeastern Australian coast.

Information

Max Size: N/A cm

Sea Temperature Range: N/A

Depth: 0-503m

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Vulnerable

Occurrence: Rare (1.0% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Solitary (1 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney