Theropod (dinosaur) Bird Track, negative Dilophosaurus Duckbill jaw

Duckbill jaw

Propalaeotherium was named by Paul Gervais: its name means "before Palaeotherium"

The skull is characterized by the absence of browridges (unlike in modern apes) and the presence of a projecting face

it may have eaten mostly fish

in most cases it would be impossible to positively identify the species of dinosaur which laid it

Theropod (dinosaur) Bird Track, negative Dilophosaurus Duckbill jawThe study of fossilized footprints, Ichnology, has become an important branch of paleontology. Footprints are trace fossils. They are considered trace fossils because they contain no fossil material, only the impressions left by the animal which made them. It is often difficult to determine with certainty which animal made a given print and therefore they are usually attributed to a group rather than a specific animal. The footprint specimens on this