Reptile Evolution
 
Vertebrata
Fish
 
Tetrapoda
Basal Tetrapoda
Temnospondyli
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Microsauria
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Reptilia/Amniota
Silvanerpeton
 
Archosauromorpha
Basal Archosauromorpha
Protosynapsida
Synapsida
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Protodiapsida
Diapsida
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Dinosauria / Theropoda
Birds / Aves
Phytodinosauria
 
Lepidosauromorpha
Urumqia clade
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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).

Cabriera et al. (2011) added Pampadromaeus to four prior studies and in each case Pampadromaeus nested as a sister to Sauropodomorpha or as a sister to Saturnalia + Sauropodomorpha. Only ten taxa were included in each test. In each study Silesaurus + Ornithischia were outgroup taxa.

 
Phytodinosauria
Eodromaeus
Eoraptor • Panphagia
Pampadromaeus
Mbiresaurus
 
Sauropodomorpha
Leyesaurus
Saturnalia
Pantydraco
Efraasia
Massospondylus
Diplodocus
Brachiosaurus
 
Ornithischia
Chilesaurus
Daemonosaurus
Pisanosaurus - Haya
Heterodontosaurus
Agilisaurus
Scelidosaurus - Emausaurus
Minmi
Lesothosaurus
Scutellosaurus
Stegosaurus
Dryosaurus - Edmontosaurus
Hexinlusaurus
Yinlong - Psittacosaurus
Stenopelix
Triceratops
 

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