Ramonalinidae

Ramonalinidae is an extinct family of marine bivalve molluscs from the late Anisian (early Middle Triassic). It was an edgewise-recliner with a flattened anteroventral surface (on which it rested) and partially fused valves. They formed distinctive mud mounds.

Taxonomy

 * Ramonalina is thus far the only known genus.