Sinum concavum
NameSinum concavum
Scientific NameSinum concavum
Common NameConcave Ear Shell
FamilyNaticidae
GenusSinum
Speciesconcavum
Geographic DistributionIndo-Pacific region, including areas such as the Philippines and Australia.
Average Size (mm)20-50
Identifying FeaturesDistinctive flattened, ear-like shape; very low, almost internal spire; wide, crescent-shaped aperture; smooth surface with fine, concentric growth lines.
Raritycommon
Author Citation(Lamarck, 1822)
Description
A flattened, ear-shaped marine gastropod shell, uniformly pale cream to off-white in color, with a very low, almost sunken spire. The shell surface appears smooth with fine, concentric growth lines. It is typically found burrowing in sandy substrates.
