Titan Buttons said:
ChupathingyX said:
Pteranodon, Plesiosaurus, Mosasaurus, Elasmosaurus, Tapejara, Ichthyosaurus etc. do not fit into either saurischia or ornithischia and are therefore not dinosaurs.
What are they classified as then?
They're prehistoric reptiles, but they do not fit within the classifications of dinosaurs.
Of course it is much more in-depth than just that.
Pterandon and Tapejara are part of the
pterosauria order, whereas elasmosaurus and plesiosaurus are part of the
plesiosauria order.
Sometimes there are superorders which encompass other orders, one of these is the superorder
dinosauria which is made up of the
ornithischia and
saurischia orders. Because neither elasmosaurus, plesiosaurus, pteranodon etc. are part of those two orders...they are not dinosaurs.