archosauria - umdtholtz/g104/handouts/104... · 2019. 9. 30. · loricata crocodylomorpha...
TRANSCRIPT
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Lagerpetidae
Silesauridae Dinosauria
Ornithodira
Pseudosuchia
ARCHOSAURIA
Pterosauria
ARCHOSAURIA
Antorbital & mandibular fenestrae; Dorsal osteoderms; Air sac system?; Belly-breathing?
Nests with vegetation; Parental care of young; Extensive vocal communication; Parasagittal stance?; Flow-through lung?
Cervicals distinct from dorsals; Elongate tibiae & metatarsi; Parasagittal stance?; Hinge-like ankle joint; ?loss of bony armor
Enlarged calcaneal tuber (”heel”); two rows of dorsal osteoderms
Only thin contact between pubis & ischium; Ascending process of astragalus
Anterior dentary tooth-less; metacarpal III >
35% of humerus; metatasal V < 50%
Elongate pubes & ischia
Lagosuchidae
Aphanosauria
Euparkeria
Ornithosuchidae
Rauisuchidae
Aetosauria
Poposauroidea
Pseudohesperosuchus
Crocodyliformes
Dracohors
Dinosauromorpha
Pterosauromorpha
Avemetatarsalia
Suchia
Paracrocodylomorpha
Loricata
Crocodylomorpha
Phytosauria
Archosauriformes
Skeletons by Scott Hartman (skeletaldrawing.com), Greg Paul