Among the most prominent predators of that time was Sphenacodon ferox

indicating that this genus represents an early form in the evolution of pliosaurs

The nasal region of the skull suggests the presence of a short proboscis or at least a muscular and flexible upper lip

Base two pieces

Australodelphis mirus Variant:Primed Among the most prominent predatorsMorphological description and paleobiological considerations of Australodelphis mirus (Cetacea, Odontoceti) from the Miocene of Antarctica Australodelphis mirus is an extinct species of toothed whale discovered in middle Miocene deposits (approximately 12 to 14 million years ago) in the Srsdal Formation of the Antarctic continent, specifically on Seymour Island (Weddell Sea). This taxon represents one of the few fossil marine mammal records from such