Reptiliomorpha

Reptiliomorpha is a clade of the amniotes and those tetrapods that share a more recent common ancestor with amniotes than with living amphibians (lissamphibians).

Reptiliomorpha
File:ChroniosuchusDB126.jpg
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Superclass:	Tetrapoda
Clade:	Reptiliomorpha
Groups
Embolomeri Chroniosuchia Gephyrostegida Diadectomorpha Amniota crown group

Unfortunately, different experts have used the term in several different ways. It has even been used for fossils of early amphibians. It is best used for animals which lay cleidoic eggs, but are not synapsids. Otherwise precursors of reptiles (sauropsids) get lumped together with precursors of mammals (synapsids).

Its only justification is that it may not always be possible to decide which group a fossil is from. But gradually, as with Seymouria, it is possible to separate fossils into more specific grouups.

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Reptiliomorpha Media

• Limnoscelis21DB.jpg

  Limnoscelis, a carnivorous diadectomorph

• Gefyrostegus22DB.jpg

  Gephyrostegus bohemicus

• Discos2gill.jpg

  Discosauriscus, a neotenic seymouriamorph

• Archeria2DB.jpg

  Archeria, an aquatic embolomere

• Seymouria2.jpg

  Seymouria, a terrestrial seymouriamorph

• Westlothiana BW.jpg

  Westlothiana, a small reptile-like tetrapod which may be an early lepospondyl, close to the origin of amniotes, or both

• 

  Proterogyrinus, an early embolomere

• Pteroplax DB.jpg

  Pteroplax, an aquatic embolomere

• Silvanerpeton1DB.jpg

  Silvanerpeton, an indeterminate Carboniferous reptiliomorph

• Eldeceeon life restoration.png

  Eldeceeon, an indeterminate Carboniferous reptiliomorph