Which dinosaur had the hardest head?

Which dinosaur had the hardest head?

Pachycephalosaurus is the largest known dome-skulled, or bone-headed, dinosaur. These dinosaurs had extremely thick skulls, and they formed the group known as the pachycephalosaurs.

What two anatomical characters stand out for identifying all ornithischians from fossil evidence?

Ornithischia is a strongly supported clade with an abundance of diagnostic characters (common traits). The two most notable traits are a “bird-like” hip and beak-like predentary structure, though they shared other features as well.

Are Theropoda ornithischians?

Despite their name, ornithischians are not related to birds, which evolved from theropod saurischian dinosaurs. Ornithischians were also distinguished by an extra bone at the tip of the lower jaw called the predentary.

Is a Triceratops a ornithischian?

Ceratopsians such as Centosaurus, Pentaceratops, and Triceratops were a horned group of ornithischian dinosaurs. Dinosaurs come in all shapes and sizes, but scientists separate species into two major groups: saurischia and ornithischia.

How are Ornithopods related to other ornithischians?

ornithopod, any member of the group of ornithischian dinosaurs characterized by a two-legged (bipedal) stance, from which the group’s name, meaning “bird-foot,” is derived. Ornithopods, along with pachycephalosaurs and ceratopsians, make up the cerapod suborder of the ornithischians.

Is Dilophosaurus saurischian or ornithischian?

Is Dilophosaurus a saurischian or an ornithischian? The Dilophosaurus was not an Ornithischian. It belonged to the Theropoda group of saurischians, which were bipedal carnivores (meat eaters).

What did ornithopods look like?

Technically speaking, ornithopods (including hadrosaurs) were plant-eating dinosaurs with bird-shaped hips, three- or four-toed feet, powerful teeth and jaws, and a lack of the anatomical “extras” (armor plating, thickened skulls, clubbed tails, etc.)

What are the distinctive features of ornithopods?

” All Ornithischians, including the ornithopods, have an important commonality: they have a backwards-pointing pubis. The pubis, or pubic bone, is one part of the pelvis. Ornithopods were mainly bipedal dinosaurs. In other words, they walked on two legs, but would sometimes use all four as you’ll soon find out.

Did the Erlikosaurus have cheeks?

The skull of Erlikosaurus andrewsi is elongated, and the teeth are symmetrical, particularly on the upper jaw. The species is thought to have approximately 31 teeth in the mouth, with those at the cheeks lanceolate in shape (a narrow oval coming to a point at the end, like a leaf).

Did Ceratopsians have cheeks?

A large, outwardly-directed jugal (i.e., “cheek bone”) in many ornithischians, especially the horned ceratopsians, was also a dead give-away for the likely presence of a large muscle body to run through and extend forward and down to the lower jaw.