Arctodus pristinus Miragaia longicollum los ossiconos del Megacerops estaban

los ossiconos del Megacerops estaban hechos de hueso y no de queratina

including giant fish

Three majestic Ouranosaurus nigeriensis

ready to fight for its life

which measured around 30 centimeters

Arctodus pristinus Miragaia longicollum los ossiconos del Megacerops estabanArctodus pristinus is an extinct species of short faced bear belonging to the genus Arctodus , which lived in North America during the Pleistocene, approximately between 2. 5 million and 10,000 years ago. It was a close relative of Arctodus simus , although smaller in size and with some morphological differences in its skeleton that suggest different ecological adaptations. Its fossil remains have been found mainly in the southeastern United States,