Diodora listeri (d'Orbigny, 1842)
Lister's keyhole limpet
Diodora listeri
photo by Coltro, Marcus

Family:  Fissurellidae (keyhole limpets)
Max. size:  4.5 cm NG (male/unsexed)
Environment:  benthic; marine; depth range 0 - 500 m
Distribution:  Western Atlantic.
Diagnosis:  Shell of medium size, elliptical. Sculpture of alternating large and small ribs, with a riblet in the interspaces (total of 3 rib sizes) crossed by distinct concentric cords. Margin crenulated. Orifice keyhole-shaped. Distinguished from Diodoro cayenensis by much coarser sculpture and alternating large and small radial ribs. Colour: cream to grey with darker radial bands.
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:   
 

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