The Hesperornis

y terminaban en garras afiladas y curvadas

which was large and robust

Secodontosaurus willistoni is believed to have lived in terrestrial environments and possibly had nocturnal habits to avoid diurnal predators and competitors

Dsungaripterus se caracterizaba por ser un pterosaurio de tamaño mediano

Ambulocetus natans Dryosaurus The HesperornisAmbulocetus natans was an extinct species of mammal that lived during the Eocene period, approximately 49 48 million years ago. The name "Ambulocetus natans" comes from Latin and translates as "walking whale" due to its ability to move both on land and in water. This mammal is an example of the mesonychians, a group of semi aquatic carnivores thought to be related to the ancestors of modern whales. Ambulocetus was characterized as a semi aquatic