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Dietary Adaptation
Insectivore

Dietary Adaptation
Herbivore

Dietary Adaptation
Carnivore

Dietary Adaptation
Omnivore

Locomotor Adaptation: Ambulatory
Walking

Locmotor Adaptation: Cursorial
Running fast, skinny/long legs

Locomotor adaptation
Digging

Locomotor Adaptation
Gliding and parachuting

Locomotor adaptation
Flying (wings)

Locomotor adaptation
Scansorial - climbing

Locomotor adaptation
Graviportal: heavy weight bearing (elephants, stegosaur)

Locomotor adaptation
Aquatic: have blubber for heat, built to glide through water

Primitive Jawless fish: has no haw, skeleton made of cartilage, like lampreys

Lobe-finned fish: ancestors of tetrapods, has fleshy paired lobe-fins joined to body with single bone

Amniote egg

Gnathostomata

Osteichthyes

Tetrapoda

Synapsida

“Pelycosaur” (sailed-back)

“Pelycosaur”

Dimetrodon

Therapsida

Mesozoic mammal

Monotremes

Anapsid skull

Lepidosaur (lizard)

Snake kinetic skull

Mosasaur

Ichthyosaur

Plesiosaur

Archosauria

Left: Primitive Tetrapod
Right: Crurotarsal ankle

Euparkaria

Early crocodile

Phytosaur

Aetosaur

Pterosaur

Rhamphorhyncoids

Pterodactyloids

Pteranodon

Mesotarsal ankle

Marasuchus

Perforate acetabulum

Ornithischia

Ornithischia

Genasauria

Heterodontosaur

Heterodontosaur

Thyreophora

Stegosauria

Stegosaur

Ankylosauria

Nodosauridae

Cerapoda

Marginocephalia

Pachycephalosaur

Pachycephalosaur

Ceratopsia

Psittacosaurus

Psittacosaurus

Neoceratopsia

Ceratopsia

Hypsilophodont

Iguanadontians

Hadrosaur mummy

Hadrosaurs (w/ crests)
Hopson study predictions


Maiasaura

Orodromeus

Oviraptor

Saurischia

Sauropodomorpha

Sauropodomorpha

“Prosauropod”

“prosauropod”

“prosauropod”

“prosauropod”

Sauropod

Diplodocid

Diplodocid

Diplodocid

Macronaria

Brachiosaur

Brachiosaur

Titanosaur

Camarasaur

Theropod (with parasagittal gait)

Neotheropoda: furcula

Ceratosaur

Ceratosaur

Tetanurae

Tetanurae

Spinosaur

Big theropod with pubic boot

Theropod

Coelurosauria

Coelurosauria

Ornithomimids

Ornithomimid