diaspid phylogeny

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diaspid phylogeny
tuatara
lizards
snakes
archosaurs
lepidosaurs
diapsid ancestor
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diaspid phylogeny
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Crocodylia alligators, crocodiles, gavials
23 extant species
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get the field guide
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most derived of the extant reptiles four
chambered heart lungs (faveoli) diaphragm thecodon
t teeth well-developed cerebral cortex
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external nostrils hard palate internal
nostrils nasopharynx fleshy folds
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Archosaurs

• large
• aquatic or semi-terrestrial
• predaceous

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sit and wait predators
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this is a true story
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males are territorial displays courtship
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females make nest clears a circular
area vegetation and mud central vegetation
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pit eggs nest covered conical structure female
stays nearby
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nest function? female returns females defend
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babies hatch vocalize female parental care
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diaspid phylogeny
crocodilians
pterosaurs
tuatara
lizards
snakes
archosaurs
lepidosaurs
diapsid ancestor
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Pteranodon
Quetzalcoatlus
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Quetzalcoatlus
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diaspid phylogeny
crocodilians
upright posture bipedal locomotion large body size
pterosaurs
tuatara
lizards
snakes
dinosaurs
archosaurs
lepidosaurs
diapsid ancestor
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diaspid phylogeny
crocodilians
saurischians
ornithischians
pterosaurs
tuatara
lizards
snakes
dinosaurs
archosaurs
lepidosaurs
diapsid ancestor
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The Ornithischians
Stegosaurus
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Hadrosaurs, the duckbilled dinosaurs
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Ceratopsians, including Protoceratops
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and Triceratops
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diaspid phylogeny
crocodilians
saurischians
ornithischians
pterosaurs
tuatara
lizards
snakes
dinosaurs
archosaurs
lepidosaurs
diapsid ancestor
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crocodilians
sauropods
ornithischians
saurischians
pterosaurs
tuatara
lizards
snakes
dinosaurs
archosaurs
lepidosaurs
diapsid ancestor
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Diplodocus
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Apatosaurus
Gigantothermy
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carnosaurs
crocodilians
sauropods
ornithischians
theropods
saurischians
pterosaurs
tuatara
lizards
snakes
dinosaurs
archosaurs
lepidosaurs
diapsid ancestor
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Allosaurus
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Tyrannosaurus
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dromaeosaurs
carnosaurs
crocodilians
sauropods
ornithischians
theropods
saurischians
pterosaurs
tuatara
lizards
snakes
dinosaurs
archosaurs
lepidosaurs
diapsid ancestor
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Utahraptor
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Deinonychus
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Velociraptor
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Birds!
dromaeosaurs
carnosaurs
crocodilians
sauropods
ornithischians
theropods
saurischians
pterosaurs
tuatara
lizards
snakes
dinosaurs
archosaurs
lepidosaurs
diapsid ancestor