Reptile Evolution
 
Tetrapoda
Ichthyostega
Reptilomorpha
Lepospondyli
 
Reptilia/Amniota
Gephyrostegus
 
Archosauromorpha
Basal Archosauromorpha
Protosynapsida
Synapsida
Mammalia
Protodiapsida
Diapsida
Terrestrial Younginiformes
Marine Younginiformes
Enaliosauria
Protorosauria
Archosauriformes
Euarchosauriformes
Archosauria
Dinosauria / Theropoda
Birds / Aves
Phytodinosauria
 
Lepidosauromorpha
Urumqia clade
Cephalerpeton clade
Captorhinidae
Milleretta Limnoscelis clade
Bolosaurus Diadectes clade
Turtle Pareiasaur clade
Lanthanosuchia
Owenettidae
Lepidosauriformes
Lepidosauria
Tritosauria
Fenestrasauria • Pterosauria
Protosquamata
Squamata
 

The skull of Pampadromaeus Note the length of the premaxillary teeth and their proximal exposure.

Pampadromaeus is a key taxon linking theropods to all other dinosaurs, the herbivorous Phytodinosauria. The enlargement of the premaxillary teeth observed in Daemonosaurus has its genesis in Pampadromaeus. The torso was shorter than in Saturnalia. The ilium resembled that of Herrerasaurus and Sanjuansaurus. The dorsal spines were lower than in Herrerasaurus. More detailed comparison can be found in Cabriera et al. (2011).


 
Protodinosauria
Dinosauria
Theropoda
Protobirds & Birds
 
Phytodinosauria
Eodromaeus
Eoraptor • Panphagia
Pampadromaeus
 
Sauropodomorpha
Leyesaurus
Saturnalia
Pantydraco
Efraasia
Massospondylus
 
Ornithischia
Chilesaurus
Daemonosaurus
Pisanosaurus • Haya
Scelidosaurus • Emausaurus
Minmi
Heterodontosaurus
Agilisaurus
Lesothosaurus
Scutellosaurus
Stegosaurus
Dryosaurus • Edmontosaurus
Hexinlusaurus
Yinlong • Psittacosaurus
Triceratops • Chasmosaurus
 

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