Archelon's shell had a unique and distinctive shape

siendo las más conocidas Dinocrocuta gigantea y Dinocrocuta brevirostris

which inhabited the cold northern steppes of the continent

hace aproximadamente 70 millones de años

y sobrevivió a la extinción masiva del Pérmico-Triásico

Ceratosaurus Scale:1:35 Archelon's shell had a uniqueCeratosaurus (C. nasicornis, 'Horned Lizard') is an extinct genus of theropod dinosaur that lived in the Tithonian of the Late Jurassic, approximately 153 and 148 million years ago, one of the last serpentine tailed Ceratosaurids. Ceratosaurus was a bipedal carnivore, quite early in the evolutionary history of theropod dinosaurs. Adult specimens could reach up to six meters in length and weigh close to a ton. Its main features were a horn over its