Medidas aproximadas del Polacanthus:

una característica típica de los basilosáuridos adaptada para sujetar y desgarrar presas resbaladizas

It is believed to have fed mainly on mollusks

making it one of the first known non-avian dinosaurs with evidence of plumage on the limbs of both legs and wings

Thylacinus cynocephalus Aenocyon Medidas aproximadas del Polacanthus:Thylacinus cynocephalus, commonly known as the thylacine, Tasmanian wolf, or Tasmanian tiger, was an extinct carnivorous marsupial and the last recent representative of the family Thylacinidae. Although its external silhouette resembled that of a canid, with an elongated body, narrow head, and limbs adapted for terrestrial locomotion, the thylacine was not related to wolves, dogs, or foxes, but belonged to an independent marsupial evolutionary