Estimated time range of diversification of Xenopus laevis (amphibians) and human (bird-mammal)

Range 520.5e+6 - 581e+6 years
Organism Various
Reference Donoghue PC, Benton MJ. Rocks and clocks: calibrating the Tree of Life using fossils and molecules. Trends Ecol Evol. 2007 Aug22(8):424-31. Graph - link PubMed ID17573149
Primary Source Database - link
Method The African clawed toad (Xenopus laevis) is a representative of modern Amphibia (the clade Lissamphibia, including frogs and toads, salamanders, and caecilians), and the human-toad split is equivalent to the deep branching point between Amphibia and Amniota. Within crown Tetrapoda, this is the split of Batrachomorpha (extant lissamphibians and extinct relatives) and Reptiliomorpha (extant amniotes and their extinct relatives).
Comments For full discussion and references see link
Entered by Uri M
ID 105157