AMNIOTA - University of Maryland, Department of Geology

AMNIOTA

Sauropsida (Reptilia)Parareptilia

Diapsida

Archosauria

Lissamphibia

Tetrapoda

Synapsida

Dimetrodon

Therapsida

Testudines

Pan-TestudinesMammalia

AMNIOTA

Archosauriformes

Mesosaurus

Euparkeria

Dicynodontia

Pareiasauria Euryapsida

Sauropterygia

Plesiosauria

Ichthyopterygia

Placodontia

Lepidosauria

Thrinaxodon

Pappochelys

Aglandular skin; Water-conserving kidneys; enhanced color vision; suborbital foramen/fenestra

Infra- and Supratemporal fenestrae; Hindlimbs more powerful than forelimbs

Antorbital and mandibular fenestrae; air sac system?; Belly-breathing?

Infratemporal fenestra

Enlarged ITF; Incisors, canines

& cheek teeth; Forelimbs more developed than

Limbs with digits; Necks; Live on land as adults

Amniotic egg; Claws; Live on land for entire life cycle

AMNIOTA - University of Maryland, Department of Geology

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