Evidence of flying dinosaurs with a 9ft wingspan and more than 100 razor-sharp teeth that dominated the skies 95 million years ago has been discovered on a building site.

A 14 inch long lower jaw belonging to one of the reptiles was found by an amateur fossil hunter.

Two of its teeth were still present and experts were able to analyse it and produce an artists impression of what the beast looked like.

They have named it Aetodactylus halli after it was uncovered by amateur fossil collector Lance Hall on a construction site near Dallas, Texas.