GEOL 240 The Dinosaurs: Theropods. What are dinosaurs? zTechnically: no such thing as dinosaurs zClassification: yClass – Reptilia (reptiles) yOrder –

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Presentation transcript:

GEOL 240 The Dinosaurs: Theropods

What are dinosaurs? zTechnically: no such thing as dinosaurs zClassification: yClass – Reptilia (reptiles) yOrder – Archosauria ySuborders xSaurischia – lizard hips xOrnithischia – bird hips Dinosaurs in popular sense

Two Major Groups

Order Saurischia zCharacterized by 3 part hip structure similar to that of lizards

Who were the Theropods Scientific Name: Gallimimus Phylum: Chordata Class: Dinosauria Theropoda

Who were the Theropods zShow up as fossils first zContained all of the carnivorous dinosaurs zAlso contained some plant eaters having remarkable characteristics

Coelurosaurs Classification of the Theropoda

Clawed Hand Sacrum of at Least 5 Vertebrae Narrow Compact Hind Foot 3 Functional Digits Bowed Femur Broadly Exposed Lachrymal Bone Typical Features of Theropods 20 cm Theropod Anatomical Features

Theropod Skull

Claws Front foot Femur Hind foot 2 cm Theropod Foot

Theropod Bird Ornithopod Mammal Theropod Foot

Dilophosaurus Theropod Skeleton

Coelophysidae

Allosaurus Theropod Skeleton

Struthiomimus Theropod Skeleton

Deinonychus 20 cm Theropod Skeleton

Oviraptor 20 cm Theropod Skeleton

Troodontid 20 cm Theropod Skeleton

Veolociraptor (Jurassic Park) Scientific Name: Velociraptor Phylum: Chordata Class: Dinosauria Theropoda

And T-Rex Scientific Name: Tyrannosaurus rex Phylum: Chordata Class: Dinosauria Theropoda

Earliest forms of Theropods zCoelurosauria Maybe…?This is what we have to work with.

Typical Coelurosauria: Saltopus

Coeleurosaurs zVery common Lower Mesozoic fossil

Archaeopteryx Fossil Maybe…?

Where are Archaeopteryx found? Mostly in Germany

Cretaceous Coelurosaurs zSome species became very specialized

Struthiomimus Or an even scarier version… Mmmmmm...dragonfly. In later years, you will see me on Sesame Street… Found in Upper Cretaceous Lance Formation on the Hanson Ranch

Dromaeosaurus: The "raptors" One version…

Or? Dromaeosaurus: The "raptors"

2 nd Theropod Group zFlesh-like spectacular forms zFamous because of their starring role in Japanese movies

Teratosaurus zEarliest species - Triassic

Teratosaurs

Tyrannosaurides (T-Rex)