It is believed that this crest had several functions

in reference to the spines that covered its body

and evidence has been found that Deinonychus inhabited social groups

they have also adapted to other environments

it is believed that it also spent some of its time in shallower water

Nothosaurus mirabilis Psittacosaurus It is believed that thisNothosaurus mirabilis (`Falso Lagarto) es un gnero de reptil Sauropterygia de la Edad Anisiense y Ladiniense del Trisico medio, hace aproximadamente 240210 millones de aos, Nothosaurus mirabilis poda llegar a medir 3 metros de largo mientras que otras especies de su gnero como el Nothosaurus giganteus podia llegar a medir unos 6 metros de largo. Estos reptiles eran depredadores y estaban perfectamente adaptados a la vida acutica, con sus patas