Synapsids Anapsids Diapsids
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Transcript of Synapsids Anapsids Diapsids
Synapsids Anapsids Diapsids
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Lepidosaurs Archosaurs
Fig 12-3
Birds
Saurischian dinos“Lizard-hips”
Ornithischian dinos “Bird-hips”
PterosaursCrocs
Who are they? Archosaur relationships
Fig 16-2
Other saurischians
Crocodilians
Slow, lethargic predators…
Right!
Monitor lizards use gular (throat) pumping
Some other lizards justStand up and run
Breathing while running: solutions in lepidosaurs
Crocs ( and dinos?) muscles pulling liver backward and “rocking” pelvic bones
Secondary palate and palatal valve. Function?
Adaptations:
Tongue salt glands of crocs and gharials
Pressure sensors
Nocturnal vision
Reproduction
“Hard pressed evolutionists: All this leaves the poor evolutionist in a difficult situation. Whatever arguments that could be fabricated to support one mode of sex determination disintegrates when one considers the other group. Could this whole sex-in-response-to-temperature thing have been designed by a Creator with a sense of humor? It seems to me this takes far less faith to accept than some yet-to-be-conceived alleged advantage of allowing temperature to determine sex one way in crocodilians and the opposite way in most, but not all turtles. It really is difficult remaining an evolutionist! I know, for I couldn't do so after looking objectively at the facts. Can you? Should you? “
E. Norbert Smith, Ph.D.
Temperature Dependent Sex Determination TDSHigher temps = males in crocHigher temps = females in turtles
Beware the False Dichotomy of religion vs evolution
How could phylogeny explain the difference between turtles and crocs?
Would this predict they would be the same or different??
True flapping flight – but different from any other flier
Pterodactyl diversity
DinosaursLizard –hipped vs Bird-Hipped
Bird
Birds are from Saurischians!!!
Bird
Saurischian and Ornithischian are two alternate solutions to moving hind limb
Ornithischians
Saurischians
Herbivorous Sauropods Carnivorous theropods
Archaeopteryx
Bird
Note the intermediate conditionOf this early bird