Placamen isabellina
NamePlacamen isabellina
Scientific NamePlacamen isabellina
Common NameIsabelline Venus Clam
FamilyVeneridae
GenusPlacamen
Speciesisabellina
Geographic DistributionIndo-Pacific region, including parts of Australia (e.g., Queensland, New South Wales), New Caledonia, and the Philippines.
Habitatsubtidal
Average Size (mm)15-30
Identifying FeaturesThe most distinctive feature is the presence of prominent, elevated, and widely spaced concentric ribs (lamellae) on the shell's exterior. The hinge plate is robust with three cardinal teeth in each valve. The pallial sinus is small and triangular.
Raritycommon
Author Citation(Philippi, 1849)
Description
Placamen isabellina is a species of marine bivalve mollusc belonging to the family Veneridae, commonly known as Venus clams. The shell is characterized by its ovate to subtrigonal shape and prominent, widely spaced, elevated concentric ribs or lamellae on the exterior. The interior is typically smooth and white. The specimen in the image displays these characteristic features, with a light yellowish-brown exterior and a cream-colored interior.
