Say's Keyhole Limpet
NameSay's Keyhole Limpet
Scientific NameDiodora sayi
Common NameSay's Keyhole Limpet
FamilyFissurellidae
GenusDiodora
Speciessayi
Geographic DistributionWestern Atlantic Ocean, from Massachusetts south to Florida, and throughout the Gulf of Mexico.
Habitatintertidal
Shell Shapeconical
Average Size (mm)15-30
Identifying FeaturesThe most distinctive feature is the oval, keyhole-shaped apical opening (foramen). Other features include strong radial ribs crossed by concentric growth lines, and an oval, low-conical profile.
Raritycommon
Author CitationDall, 1889
Description
A univalve marine gastropod shell, characterized by its oval, low-conical shape and a distinctive keyhole-shaped opening (foramen) at its apex. The shell surface typically exhibits both radial ribs and concentric growth lines, giving it a textured appearance. The color is generally light, ranging from off-white to sandy beige.
