ERTH 2104 Lecture Notes - Lecture 9: Ceratopsidae, Psittacosaurus, Styracosaurus
14 Dec 2019
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Document Summary
Rostral bone: a bone shaped structure symbolizing an. First appears in late jurassic of north america and asia, rare fragments found in europe. Great herds in alberta, montana, and wyoming. Ceratopsian skulls: psittacosaurid: psittacosaurus, protoceratopsid: protoceratops, centrosaurine ceratopsid: styracosaurus, chasmosaurine ceratopsid: chasmosaurus. Rostral bone: unique bone at the tip of snout leading to a parrot-type beak. Skull that is narrow and the beak is flaring. Frill composed primarily of paired parietal bones (on top of. Folding of bones on tip of the head to form secondary skull. Dental batteries: back up teeth for heavy chewing. Keeping predators away with display of horns and frills. Hooks on the back of the frill. Long spikes expanding from the back of the frill. Ontogenetic series: age of a certain type of species (what species came before the other) Neck vertebrae: heavy skulls need the support of fused neck vertebrae. First ceratopsian found in asia dating back to late triassic.
