Macroschisma dilatatum
NameMacroschisma dilatatum
Scientific NameMacroschisma dilatatum
Common NameDilated Keyhole Limpet
FamilyFissurellidae
GenusMacroschisma
Speciesdilatatum
Geographic DistributionIndo-Pacific (e.g., Japan, Philippines, Australia)
Habitatintertidal
Average Size (mm)15
Identifying FeaturesThe most distinctive feature is the prominent, elongated, slit-like apical opening (keyhole). The shell is relatively flat, with fine radial sculpture and a low profile.
Raritycommon
Author CitationA. Adams, 1852
Description
A small, cap-shaped marine gastropod shell, characterized by its low profile and a distinctive elongated, slit-like apical opening. The shell exhibits brownish coloration with radial striations and some lighter bands, often found in rocky intertidal and subtidal environments.
