Fordilla
Encyclopedia
The Early Cambrian fossils Fordilla and Pojetaia
are regarded as bivalves. Their inner shell layers were constituted of layers of carbonate akin to the laminar aragonite layer in extant monoplacophora.
Pojetaia
Pojetaia is the earliest known crown-group bivalve. Its inner shell was constituted of layers of carbonate akin to the laminar aragonite layer in extant monoplacophora....
are regarded as bivalves. Their inner shell layers were constituted of layers of carbonate akin to the laminar aragonite layer in extant monoplacophora.