Vertebrate Paleontology

21.

Ornithischian Diversity

21.1.

Ornithischian Characteristics

21.1.1.

Predentary Bone

21.1.2.

Leaf-shaped Teeth

21.1.3.

Herbivorous Specializations

21.2.

Basal Ornithischians

21.2.1.

21.2.2.

21.2.3.

21.3.

21.3.1.

Armor Evolution

21.3.2.

21.3.3.

21.3.3.1.

21.3.3.2.

21.3.3.3.

Tuojiangosaurus

21.3.4.

21.3.4.1.

21.3.4.2.

21.3.4.3.

Club Tail Evolution

21.4.

21.4.1.

Heterodontosauridae

21.4.2.

Hypsilophodontidae

21.4.3.

21.4.3.1.

21.4.3.2.

21.4.3.3.

21.4.4.

Dental Batteries

21.4.5.

Chewing Mechanisms

21.5.

Marginocephalia

21.5.1.

Pachycephalosauria

21.5.1.1.

21.5.1.2.

Head-butting Behavior

21.5.1.3.

21.5.1.4.

Pachycephalosaurus

21.5.2.

21.5.2.1.

21.5.2.2.

21.5.2.3.

21.5.2.4.

Frill and Horn Evolution

21.6.

Ornithischian Ecology

21.6.1.

Herding Behavior

21.6.2.

21.6.3.

21.6.4.

Predator Avoidance

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22. Avian Origins and Early Evolution