Meraxes (M

and possibly for defense

as the distinction between ontogenetic variation and actual taxonomic differences in tyrannosaurids is complex

Although the skull is not fully known

It is also believed that it had a long

Boreopterus Troodon Meraxes (MBoreopterus is a genus of pterodactyloid pterosaur from the Early Cretaceous (BarremianAptian, around 125 million years ago) , known from well preserved fossils in the Yixian Formation of Liaoning Province, northeast China. [turn0search1][turn0search2] It is classified within the family Boreopteridae , a lineage closely related to ornithocheirids, characterized by cranial and dental adaptations that suggest a piscivorous lifestyle . The skull of