List of transitional fossils

This is a very tentative list of transitional fossils. An ideal list would only recursively include 'true' transitionals, i.e. those forms morphologically similar to the ancestors of the monophyletic group containing the derived relative, and not intermediate forms. See the article on transitional fossils for explanation of the difference with intermediate forms.

• Fish to Amphibians
  • Osteolepis
  • Eusthenopteron
  • Panderichthys
  • Elginerpeton
  • Obruchevichthys
  • Hynerpeton
  • Tulerpeton
  • Acanthostega
  • Ichthyostega
  • Pederpes finneyae
  • Eryops
• Amphibians to Amniotes (early reptiles)
  • Proterogyrinus
  • Limnoscelis
  • Tseajaia
  • Solenodonsaurus
  • Hylonomus
  • Paleothyris
• Synapsid reptiles to mammals
  • Protoclepsydrops
  • Clepsydrops
  • Dimetrodon
  • Procynosuchus
• Diapsid reptiles to birds
  • Compsognathus
  • Protoavis ?
  • Archeopteryx
  • Changchengornis
  • Confuciusornis
  • Ichthyornis
• Evolution of the Horse
  • Eohippus
  • Mesohippus
  • Parahippus
  • Merychippus
  • Pliohippus
  • Equus

External links

Palaeos Vertebrates starting with lobe-finned fish (very comprehensive)

Early birds