Scale bar = 10 µm
Bivalve is biundulate panduriform with parallel striae
Epilithic sample collected from under a bridge.
Scale bar is 10µm
Epilithic sample taken in sunny area.
Scale bar = 10 µm. Valve is concentrically undulate with a prominent ring of spines along the valve face-mantle junction. Central fultoportulae in a promine ring on the face.