Diodora tanneri
NameDiodora tanneri
Scientific NameDiodora tanneri
Common NameTanner's Keyhole Limpet
FamilyFissurellidae
GenusDiodora
Speciestanneri
Geographic DistributionEastern Pacific Ocean, ranging from Southern California (USA) to Baja California (Mexico).
Habitatintertidal
Shell Shapeconical
Average Size (mm)Up to 20-30 mm in length. The specimen in the image appears to be around 15-20 mm.
Identifying FeaturesThe most distinctive feature is the central, apical, keyhole-like or circular opening (foramen). The shell is conical with an oval base and strong radial sculpture, which is clearly visible in the image.
Rarityrare
Author CitationDall, 1903
Description
A small, conical marine gastropod shell, commonly known as a keyhole limpet. It features a distinct apical opening (foramen) and prominent radial sculpture. The specimen shown is off-white to cream in color, with visible concentric growth lines and radial ribs.
