Massojonovii
Massojonovii is a genus of extinct bivalve mollusks that lived during the Late Cretaceous period. Fossils of Massojonovii have been found in various locations around the world, particularly in marine sedimentary rocks. These bivalves are characterized by their equivalve shells, meaning both valves are roughly equal in size and shape. The shell surface often exhibits distinct radial ribs, which can vary in prominence and number depending on the specific species.
The ecological role of Massojonovii is inferred from its fossil record. They were likely marine filter feeders,