Fissurella macrotrema
NameFissurella macrotrema
Scientific NameFissurella macrotrema
Common NameKeyhole limpet
FamilyFissurellidae
GenusFissurella
Speciesmacrotrema
Geographic DistributionIndo-Pacific region, including areas such as the Philippines and Indonesia.
Habitatintertidal
Shell Shapeconical
Average Size (mm)20-50 mm (length)
Identifying FeaturesThe most prominent identifying feature is the elongated, oval apical opening, or 'keyhole', which gives the family its common name. The shell also displays fine to moderate radial ribbing and a relatively low-conical profile.
Raritycommon
Author CitationSowerby I, 1835
Description
A species of keyhole limpet, characterized by its low-conical shell and a distinctive, elongated apical opening (keyhole). The shell exhibits radial sculpture and varying color patterns, often found in marine intertidal and subtidal environments.
