los amonites se han extinguido y solo se conocen a través de sus fósiles

which they may have used for hunting or defense

The skull of the Yi qui was small and elongated

such as mammoths and woolly rhinos

or poikilothermic

Acrocanthosaurus atokensis Acrocanthosaurus los amonites se han extinguidoAcrocanthosaurus atokensis is the only known species of the extinct genus Acrocanthosaurus, a carcharodontosaurid theropod dinosaur that inhabited North America during the Cretaceous period, approximately 125 to 99. 6 million years ago. It stands out for the tall neural spines on many of its vertebrae, which suggest the presence of a kind of "hump" on its neck, back and hips. It was one of the largest theropods, with a length of up to 11. 5 meters and