Fossils

Living Amphibian Origins

From the Aweb site:

A new paper on amphibian evolution (Sigurdsen and Bolt 2009) shows that salamanders and frogs share elbow morphology with the fossil caecilian Eocaecilia. In turn this synapomorphy is shared only with the Paleozoic temnospondyls, and not with lepospondyls, lending support to the monophyletic origin of lissamphibians from temnospondyls.

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Bones, molecules and crown-tetrapod origins.

Bones, molecules and crown-tetrapod origins., Ruta, M., and Coates M. , Telling the Evolutionary Time: Molecular Clocks and the Fossil Record., London, (2003)