Fissurella decemcostata
NameFissurella decemcostata
Scientific NameFissurella decemcostata
Common NameTen-ribbed Keyhole Limpet
FamilyFissurellidae
GenusFissurella
Speciesdecemcostata
Geographic DistributionWestern Atlantic Ocean, including the southeastern United States (e.g., Florida), the Caribbean Sea, and parts of South America (e.g., Brazil).
Habitatintertidal
Shell Shapeconical
Average Size (mm)15-30 mm in length, though smaller specimens like the one pictured (estimated 10-15 mm) are common.
Identifying FeaturesKey identifying features include the prominent, elongated, keyhole-shaped apical opening (foramen), and the strong radial sculpture consisting of typically 10 primary ribs (hence 'decemcostata') and finer secondary ribs, crossed by concentric growth lines. The shell margin is distinctly crenulated.
Raritycommon
Author CitationTurton, 1819
Description
A small, cap-shaped marine gastropod shell, commonly known as a keyhole limpet. It features a distinctive elongated apical opening (foramen) and a sculptured exterior with prominent radial ribs and concentric growth lines. The shell in the image displays an off-white to light pinkish-brown base color with irregular reddish-brown markings.
