ERTH 2104 Lecture Notes - Lecture 7: Ornithischia, Heterodontosauridae, Phora
14 Dec 2019
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Document Summary
Process of pubis has rotated backwards to lie close to and parallel with the ischium. Opisthopubic condition: the feature that distinguishes the ornithischian and saurischian. An additional bone, the predentary , joining the front of the lower jaws. A narrow bone, the palpebral, crossing the outside of the eye socket, possible mobile and connected with the upper eyelid. A toothless and rough front tip of the snout. Ossified (bony) tendons above the sacral region for stiffening the backbone at the pelvis. No ornithischian fossils of triassic age are found compared to triassic saurischians. The most basal major radiation of ornithischia. Early jurassic to early cretaceous; lived on most continents. Small bodied bipeds with canine like front teeth and chewing back teeth this may indicate that it was an omnivore. At least some had a tuft of hair growing along the lower back onto the tail. Close to the base of the clade genasuaria.
