40 Million Years of Dog Evolution - ThoughtCoAug 23, 2017 . The First Canids: Hesperocyon and the "Bone-Crushing Dogs" . or "bone-crushing dogs," equipped with powerful jaws and teeth suitable for scavenging . The Ones That Got Away: The Ancestral Fish of the Paleozoic Era.jaw crusher reptiles,'Shell Crusher' shark swam ancient oceans › News in Science (ABC .Feb 25, 2010 . With 1000 teeth in its jaw, the 88.7 million-year-old shark could . the 'shell crusher', which pulverised shelled animals with its 1000 teeth.
jaw crusher reptiles