Ridge-Backed Keyhole Limpet
NameRidge-Backed Keyhole Limpet
Scientific NameFissurella fascicularis
Common NameRidge-Backed Keyhole Limpet
FamilyFissurellidae
GenusFissurella
Speciesfascicularis
Geographic DistributionWestern Atlantic Ocean, including the Caribbean Sea, Gulf of Mexico, and coasts from Florida to Brazil.
Habitatintertidal
Shell Shapeconical
Average Size (mm)25-40
Identifying FeaturesThe elongated, keyhole-shaped apical opening is the primary identifying feature. Other characteristics include its elongated oval outline, low conical profile, and fine radial sculpture. The color pattern of radiating brown bands on a lighter background is also typical.
Raritycommon
Author CitationLamarck, 1822
Description
A univalve gastropod shell, elongated and oval in shape, characterized by a distinctive keyhole-shaped apical opening. The shell exhibits fine radial sculpture and a pattern of light and dark bands. The 'ridge-backed' common name refers to a subtle elevation along the shell's midline.
