SLIDE 1 Guide to writing your Natural History report
Natural History of Dinosaurs, 2016
Guidelines The Natural History report is due: April 25, 2016 in SECTION.
- Report Body: 4 pages long (no more, no less)
- References: Place your references on the 5th page. The format should
be: “Author(s). Date. Title. Source.” All references must be cited at least
- nce within the text of the report (see below for instructions regarding
parenthetical citations)
- Need at least 5 references
- Margins: 1 inch (top, bottom, left, right)
- Spacing: 1.5
- Font: 12 point Times New Roman
- Ignoring these guidelines will result in loss of points
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Fastovsky ch. 12
+ maybe ch. 11? (only if we cover these chapters in class)
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Basal Theropods
~ Ceratosaurs ~ Spinosaurs
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Intermediate Theropods
~ Carnosaurs ~ Tyrannosaurs ~ Therizinosaurs
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Derived Theropods
~ Troodontids ~ Dromaeosaurids
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Ceratosaurs Tyrannosaurs Spinosaurs Oviraptor Therazinosaurs Troodontids Dromaeosaurids Avialae
Theropods: Simplified
Carnosaurs Ornithomimosaurs Basal Intermediate Derived
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Carnosaurs
Big nostrils and elaborate sinuses Big head Large bodied (> 5 m long) Allosaurus
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Giganotosaurus; Late Cretaceous South America 16 meters (52 ft) long Skull was 6.3 ft long May have preyed on large Sauropods
Carnosaurs
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Giganotosaurus; Late Cretaceous South America 16 meters (52 ft) long Possibly a pack hunter. 16% larger brain than similar-sized carnivores *WINNING*
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Charcarodontosaurus; Mid Cretaceous Africa 15 meters (50 ft) long
Carnosaurs
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Carcharodont-osaurus ‘jagged tooth’-reptile
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Coelurosauria
~ Carnosaurs ~ Tyrannosaurs ~ Therizinosaurs
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OOPS vs Coelophysis Compsognathus
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Arctometatarsal ankle = faster runners?
yes yes no
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Coelurosaurs: An Equine Analogue
SLIDE 17 Tyrannosaurs
Large bodies, short arms
- T. rex: last and largest Tyrannosaur
Guanlong: basal Tyrannosaur
Laelaps
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Horse-sized primitive tyrannosaur Timurlengia euotica from the middle Cretaceous (ca. 90 million to 92 million years ago) of Uzbekistan.
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Ornithomimosaurs
Small, lightly built skulls with tiny orbits No upper teeth, few lower teeth Long arms
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Struthiomimus; Late Cretaceous N. America 4.3 meters (14 ft) long
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Coelurosauria
~ Carnosaurs ~ Tyrannosaurs ~ Therizinosaurs
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Maniraptorans: Evolution of the semi-lunate carpal ~ wrist bone that increased hand dexterity
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Oviraptor
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Therazinosaurs
Nothronychus Erlikosaurus Plant-eating teeth? Backward pointing hips 3 ft. long claws
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Ground Sloths of the Mesozoic? Therazinosaurs
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Derived Theropods
~ Troodontids ~ Dromaeosaurids
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Troodontids
Troodon Sinvenator
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Troodontids
Troodon Sinvenator
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Reptiles Birds
Troodon Velociraptor
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Dromaeosaurids
Velociraptor Deinonychus
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SLIDE 41 “Boreonykus, a new species of dinosaur about the size
- f a dog and possessing a lethal claw. The remains of
the Boreonykus were discovered at the Pipestone Creek bonebed — a huge gravesite of the plant-eating dinosaur Pachyrhinosaurus that dates back 73 million years.”
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Dromaeosaurids
Utahraptor
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Theropod Teeth
Dromaeosaurus Tyrannosaurus
Dromaeosaurids
Recurved Larger serration-length to tooth-length ratio slash-and-tear
Tyrannosaurids
Conical; bulky Smaller serration-length to tooth-length ratio CRUSH-AND-DESTROY
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Independent loss of teeth among Theropod dinosaurs Oviraptors: Egg eaters? Nope. Mollusk shells? Large seeds? Ornithomimids: Omnivorous? Small vertebrates/invertebrates Eggs, Seeds, Fruits
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Theropod Skulls
Robust
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Theropod Skulls
Gracile
