Pterosaur, Pteranodon 5 Foot Hanging Model Compsognathus Orthacanthus is an extinct genus

Orthacanthus is an extinct genus of fresh-water shark from a family of prehistoric sharks known as Xenacanths

which attached to these vertebrae

of which it seems to have been a southern offshoot

Mastodons had cusp-shaped teeth

It was discovered in China by a team of American and Chinese scientists

Pterosaur, Pteranodon 5 Foot Hanging Model Compsognathus Orthacanthus is an extinct genusPterosaurs meaning "winged lizard" are flying reptiles of the extinct clade or order Pterosauria. They existed from the late Triassic to the end of the Cretaceous (228 to 66 million years ago. Pterosaurs are the earliest vertebrates known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the ankles to a dramatically lengthened fourth finger. Early species had long, fully toothed