By Julio Lacerda Amphicyonids are popularly known as bear-dogs because their anatomy resembled a mix of both animals, of which they were relatives. They were big carnivorous mammals that inhabited North America, Europe, Asia and Africa for almost 45 million years. This is a Royalty Free image suitable for every educational, editorial, or commercial purposes. Â
The second species of the genus Anhanguera, A. piscator had a long low crest on the upper surface of its snout compared to a taller crest in A. blittersdorffi. Illustration by Bálint Benke
By Nathan E. Rogers This heavy-duty neighbor of Tyrannosaurus rex is known for the elaborate armor on its back, made of plates of bone embedded in its skin. The bony club on the end of its stiff tail would have helped it fend off predators. This is a Royalty Free image suitable for every educational, editorial,…
By Andrey Atuchin Anomalocaris was one of the world s first top predators in the ancient Burgess Shale ecosystem. The first fossils were isolated parts, interpreted as shrimp or jellyfish, but later finds revealed that it was a large swimming hunter. This is a Royalty Free image suitable for every educational, editorial, or commercial purposes.
Anurognathids were a family of small acrobatic pterosaurs that hunted insects on the wing like living bats and nightjars. Illustration by Bálint Benke
By Julio Lacerda Anurognathus is a small pterosaur known for its short head, massive eyes, and small teeth. Its large eyes suggest that it hunted during the dark in the forests of Jurassic Period Germany. This is a Royalty Free image suitable for every educational, editorial, or commercial purposes.
By Julio Lacerda A Brazilian spinosaur’s leg bone shows it already lived in the waters ten million years before Morocco’s iconic Spinosaurus. This swimming dinosaur of unknown identity might’ve been the largest in its habitat – and was still growing before it died. This is a Royalty Free image suitable for every educational, editorial, or commercial purposes.
Archaeopteryx, the first bird, was discovered over 150 years ago in Upper Jurassic rocks in southern Germany. Since its discovery, it has been regarded as transitional between reptiles and birds. Illustration by Julio Lacerda
Long known as the first bird, recent fossil discoveries of other feathered dinosaurs have taken this superlative away from Archaeopteryx, leading to a discussion over whether this feathered theropod dinosaur was an ancestor or relative of modern birds. Illustration by Julio Lacerda
By Julio Lacerda Archaeotherium is a member of Entelodontidae, popularly known as terminator pigs. Despite its boar-like appearance, this cow-sized predator was more closely related to the hippopotamus and whales. This is a Royalty Free image suitable for every educational, editorial, or commercial purposes.
Like living sea turtles, the ancient marine turtle Archelon only left the water to lay eggs at the beach. It had a leathery shell like living leatherback turtles, but was part of a distantly related and completely extinct family or turtles, the protostegids. Illustration by Anthony Hutchings
A pair of the giant marine turtle Archelon mate near the surface of a sea that cut through the American Great Plains during the Late Cretaceous. The long ridges and leathery shell of Archelon resemble living leatherback turtles, but they were actually part of a completely extinct lineage of turtles, the protostegids. Illustration by Anthony…
While most plesiosaurs hunted fish and squid, Aristonectes and kin filtered prey out of the muddy seabed with their teeth. Illustration by Corbin Rainbolt