ERTH 2401 Lecture Notes - Lecture 12: Iguanodon, Ornithopod, Hypsilophodon
25 Oct 2016
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Document Summary
From paleo equator to polar latitudes: notable high paleolatitude discoveries. Antarctica new genera of basal ornithopods. Paper: how migration had occurred; islands connected water levels changed. Seymour island, antarctica hadrosaurs lived here boundary between cretaceous and tertiary. Paleoenvironments: coastal plain deposits indicating rich vegetation, fluvial deposits, marine deposits lived close to the shorelines and when died were swept out to sea. Locomotion: bipedal terrestrial animals, quadrupedal stance when standing still or feeding, did the iguanodons have quadrupedal locomotion, strong hindlimbs to support weight. Maiasaura: hadrosaurids iguanodont - walks on all 4 limbs. Speed and brains: 15-20km/hour with max speeds when sprinting up to 60km/hr, smaller ornithopods run faster, relatively large brains compared to body relatively smart. Intelligence helped alertness senses well developed: no other means of protection (e. g. armour or tail spikes) present, makes noises to warn herds, had to make due with alertness and intelligence.
