Diodora aspera

Keyhole limpet | Rough keyhole limpet
Diodora aspera
Diodora aspera, British Columbia, Canada, Photo: Em Lim
Diodora aspera
Diodora aspera, British Columbia, Canada, Photo: Em Lim
Diodora aspera
Diodora aspera, Channel Islands, USA, Photo: Olivia Johnson
Diodora aspera
Diodora aspera, Channel Islands, USA, Photo: Olivia Johnson
Diodora aspera
Diodora aspera, Monterey, USA, Photo: Olivia Johnson
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Diodora aspera
Diodora aspera
Diodora aspera
Diodora aspera
Diodora aspera

Distribution


Description

Shell can exhibit coarse radial ribs, and at the apex is a round or broadly oval anal opening. The shell is nearly entirely exposed, with the mantle covering the very edge of the shell in live animals. 


Information

Max Size: N/A cm

Sea Temperature Range: N/A

Depth: N/A

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: Not Evaluated

Occurrence: Widespread (61.4% 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: Several (5 per transect)

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