Go back over cladogram and how to use it Paleontologist someone who studies ancient organisms Paleobiologist someone who studies the lives of ancient organisms Jefferson father of paleobiology Dinosauria First proper name given to dinosaur Scrotum humanum PIC Actually the thighbone of the meat eating dinosaur Megalosaurus Dinosauria Sir Richard Owen named them PIC First records of dinosaurs were in China Megalosaurus No excitement no one cared because thought it was just a giant crocodile First described herbivorous dinosaur Iguanodon iguana tooth Eat plants great deal of excitement unlike megalosaurus Baron George Cuvier showed extinciton can occur Rober Bakker Deinonuchus helped change perceptions about dinosaurs Dino active agile Dinosaur Characteristics 3 or more sacral vertebrae perfoate acetabulae 3 main fingers Closely related to pterosaurs flying reptiles Ornithischians vs Saurischians diff in hip struct Ornithischians bird shaped hips pubis points back Saurischians lizard shaped hips pubis points fwrd Age of Dino Showed up 238 million years ago Extinct 65 5 million yrs ago as well as 40 80 of all life Climate was warm arid desert like like florida in the middle latitudes and cool and rainy at the poles no ice caps Best isotope to age dinosaurs Uranium 235 becomes Lead 207 Found in sedimentary rocks Closest place to FL to find Dinosaur fossils Georgia Earliest members of major dinosaurs were SMALL Terrestrial Found on LAND NOT oceans Specifically remember Stupidest Stegosaurus Smartest Troodon size of brain like birds Tallest 56ft Sauroposeidon lizard earthquake god Smallest 7oz Fastest Ornithomimids Longest Seismosaurus head will be beyond back wall of classroom 140 ft Dino names Archaeopteryx first bird PIC Heterodontosaur denitition is unique Ceratopsian parrot like beak inspired Green legends of Griffin Hadrosaurs have the most info about them because they were in herds common greagarious eggs found Plesiosaur Loch ness monster PICS are important Dino Names Pachryrhinosaurus Boss on nose theory was base for enormous horn Pachycephalosaurs fought by head ramming Ceratosaur gap between front and back teen mistaken for venom groove Coelophysis ate crocodiles story about them being cannibals Theropod dinosaur with scissor hands may have eaten plants NOT ON SHEET Theropod birds evolved from them teeth have serrated edge Oviraptor Protoceratops egg stealer Spinosaurus destroyed in british bombing Ceropoda gap b w front and back teeth Gigantosaurus larger than t rex PIC DINO features Dental battery 100 s of tightly adjoining teeth Enamel on one side of teeth helps to sharpen them Osteoderm dones found in the skin Endocasts casts of brain cavity used to see what senses they relied on T REX 2 fingers not 3 Good sense of smell large olfactory bulbs Lizard hips Tracks show they did not drag their tails They could only amble not run Engineering Computerized finite element modeling models to see bite forces Crocs highest bite force is 3700 lbs Growth Curves show dinosaurs grew like marsupials and faster than reptiles Extinction Theories Volcanism Sea levels dropped Impact of asteroid Chicxulub Crater in the Gulf of Mexico primary theory KT Extinction Event 40 to 80 of all life forms went extinct Problem with theories Animals like frogs and crocs survived they are extremely sensitive to environmental changes so why would they have survived Dinosauroid Human like and dinosaur like creature Theory that if dinos had not gone extinct they would have evolved to look like a creature similar to humans Dino New Look Fossils showed they had feathers Gliding dinos had four wings Birds evolved from Theropod dinos Bone structure blend of avian reptilian traits Their sex is still not known sexual dimorphism Theory of vertebrae can determine sex not proven Additional terms to know Coprolite dino feces Encephalization Quotient how much brain compared to mass Over splitting giving multiple names to one species more than their really are Brontosaurus same as Apatosaurus
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