XL 4" Basilosaurus Tooth Rooted Prehistoric Whale 34 Mil Yrs Old Late Eocene COA Prognathodon and the presence of additional and the presence of additional pterygoid teeth enabled it to securely grip prey while advancing its jaw to ingest the target entirely These findings indicate that the species was present in the Mediterranean basin at the end of the Mindel Riss interglacial (Oxygen Isotope Stage 7) and during each high sea level episode of the Riss Würm interglacial (Oxygen Isotope Stage 5) it was actually one of the earliest true whales Fossil evidence shows that Basilosaurus was a carnivore with strong jaws lined with sharp