AMNIOTA - University of Maryland, Department of Geology

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AMNIOTA Sauropsida (Reptilia) Parareptilia Diapsida Archosauria Lissamphibia Tetrapoda Synapsida Dimetrodon Therapsida Testudines Pan-Testudines Mammalia 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 hind Limbs with digits; Necks; Live on land as adults Amniotic egg; Claws; Live on land for entire life cycle

Transcript of AMNIOTA - University of Maryland, Department of Geology

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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

hind

Limbs with digits; Necks; Live on land as adults

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

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