The most dangerous prehistoric species is that of Dinosaurs.
The dinosaurs can be carnivores or herbivores. If the carnivores were alive, by now they would have eaten a large number of animals and human beings. Such a carnivore is Velociraptor.
The herbivores are no danger for us.
megalodon
No It is said by scientists that the Megalodon [from the prehistoric era] is the most dangerous and it can go up to 18 meters long.
mammoth
hunting
During the time of prehistoric animals, most notably dinosaurs, California was home to many different species. These included the Smilodon, or the saber-toothed tiger, the Californiasaurus, and the Nodosaurus.
Iguana Impala Prehistoric species: Iguanadon Ichthyosaur
prehistoric frilled shark
I would say that mankind is. Have you ever known another species so capable of destruction?Since the question does not specify which species that you are inquiring about, one must fill in that information. If you are inquiring about which creature on Earth has the capacity to be the most unpredictable and dangerous in the greatest variety of circumstances, then Man is the correct answer.
For being the most well-known of the mammoth species and for being the best-understood prehistoric vertebrates, in terms of anatomy.
uh, yeah the red scorpion is one of the most dangerous species of scorpions known to man...
lions and tigers and fur-less ones
One species of prehistoric flying dinosaur was the pterodactyl.