Didymoceras nebrascense - an unusual ammonite from the Late Cretaceous, ~70 million years ago, found in the seas of North America. It was one of heteromorph ammonites, known for their odd shells that formed a variety of strange and complex shapes. 1/3
@gabipaleo.bsky.socialAnisopleurodontis - a shark-like fish from the Permian period, related to the famous Helicoprion. Found in the same fossil formation as Prionosuchus, it lived in rivers, lakes or maybe even swamps in Brazil ~270 million years ago, being the second-largest predator there. 1/3
