Original groups
Traditionally dinosaurs have been divided into two main groups, Ornithischia (bird hipped dinosaurs) and Saurischia (lizard-like hips)
Sauropoda
Diplodocus
Herreras-
auridae
Medium-sized
hunters
Theropoda
T Rex
and birds
Ornithischia
Stegosaurus
Saurischia
Dinosauria
Ornithischia
New reorganisation
Scientists have discovered that T Rex is more closey related to Ornithischia (Stegosaurus) and now lies within a new group called Ornithoscelida
Sauropoda
Diplodocus
Herreras-
auridae
Medium-sized
hunters
Theropoda
T Rex
and birds
Ornithischia
Stegosaurus
Saurischia
Ornithoscelida
Dinosauria
Original groups
Traditionally dinosaurs have been divided into two main groups, Ornithischia (bird hipped dinosaurs) and Saurischia (lizard-like hips)
Sauropoda
Diplodocus
Herrerasauridae
Medium-sized hunters
Theropoda
T Rex and birds
Ornithischia
Stegosaurus
Saurischia
Dinosauria
Ornithischia
New reorganisation
Scientists have discovered that T Rex is more closey related to Ornithischia (Stegosaurus) and now lies within a new group called Ornithoscelida
Sauropoda
Diplodocus
Herrerasauridae
Medium-sized hunters
Theropoda
T Rex and birds
Ornithischia
Stegosaurus
Saurischia
Ornithoscelida
Dinosauria