TETRAPODA

AMPHIBIA

Labyrinthodon

Reptiliomorph

Lepospondyli

Amphibia

REPTILIA

PARAREPTILIA

Anapsida

Turtles

DIAPSIDA

Lower Diapsida

Lizards

Snakes

Sphenodonts

Ichthyosaurs

Placodonts

Sauropterygia

ARCHOSAUROMORPHA

Lower Archosaurmorpha

Pterosauria

Crocodilia

Pseudosuchia

Dinosaurs

Theropoda

Sauropoda

Ornithopoda

Armored Ornithopoda

Aves

SYNAPSIDA

Pelycosaurs

Dicynodonts

Theirodontia

Mammals

Ichnology

Eggs