where its fossil remains have been found

Height 164 mm

Se estima que Helicoprion medía alrededor de 3 a 8 metros de longitud

approximately 84 to 71 million years ago

Big John was found on a ranch in Montana

Linhenykus monodactylus sexta_extincion where its fossil remains haveLinhenykus monodactylus was a small theropod dinosaur that lived in the late Cretaceous period, approximately 84 to 75 million years ago, in what is now Asia. The fossil remains of this dinosaur were discovered in the Wulansuhai Formation near Linhe in Inner Mongolia, China, which explains its name. It was first described in 2011 and is one of the most interesting members of the alvarezsaurid family, a group of small bipedal dinosaurs that specialized