GLY-1842 Lecture Notes - Lecture 17: Labyrinthodontia, Brassica Oleracea, Anapsid
Document Summary
*primitive amphibians are very different than modern ones. Amniote , big flat head better vertebral column bigger limbs complex articulations modern : humans, birds, lizards, turtles, all mammals called amniote bc they have amniotic egg amniote skull , anapsid, synapsid, diapsid. Anapsid skulls: primitive condition, found today in turtles, many primitive reptile groups are anapsid, reduce weight, easier to attach muscles. Synapsid skulls (mammal like reptiles: derived conditions, found in mammals, missed a slide. Diapsid skulls: derived condition, found in lizards snakes birds crocodiles, many primitive reptile groups are diapsids before the rise of dinosaurs, synapsid were the most common large tetrapod synapsid. Late tr - j first mammals (hadrocodium) Late p-tr therapsids like cynodonts and dicynodonts. Early p - pelycosaurs (fin back) dimetrodon. not a dinosaur early permian late permian. Mammals trends upright secondary palate (breathe & eat) differentiation of the teeth. Therapsid synapsid like gorgonsopsids haired jaw bones become ear bones double rooted teeth.
