Tylodina corticalis

Tylodinidae
Umbrella Shell
  • Tylodina corticalis, Port Stephens, NSW, Photo: Tom Davis
    Tylodina corticalis, Port Stephens, NSW, Photo: Tom Davis
Distribution
Temperate Australasia
Description
Only species in the family recorded from Australia. The animal is bright chrome yellow with a wide foot, and the shell is oval-shaped and covered by a thick brown protective layer (the periostracum) with strong radial ridges. The species is very rarely seen outside the autumn months. It feeds on a yellow sponge (Pseudoceratina sp).
Information
  • Max Size: 10 cm
  • Sea Temperature Range: 12.7-21.9°C
  • Depth: 0–60 m
  • Habitat: Rocky Reef
Rarity
  • IUCN Threat Status: Not Evaluated
  • Occurrence: Infrequent (3% 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: Nicola Davis, GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney
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