Initial Diversification of Living Amphibians Predated the Breakup of Pangaea

@article{SanMauro2005InitialDO,
  title={Initial Diversification of Living Amphibians Predated the Breakup of Pangaea},
  author={Diego San Mauro and Miguel Vences and Marina Alcobendas and Rafael Zardoya and Axel Meyer},
  journal={The American Naturalist},
  year={2005},
  volume={165},
  pages={590 - 599}
}
The origin and divergence of the three living orders of amphibians (Anura, Caudata, Gymnophiona) and their main lineages are one of the most hotly debated topics in vertebrate evolution. Here, we present a robust molecular phylogeny based on the nuclear RAG1 gene as well as results from a variety of alternative independent molecular clock calibrations. Our analyses suggest that the origin and early divergence of the three living amphibian orders dates back to the Palaeozoic or early Mesozoic… 
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References

SHOWING 1-10 OF 57 REFERENCES
Molecular evidence for the early history of living amphibians.
TLDR
Evidence from the DNA sequences of four mitochondrial genes that challenges the conventional hypothesis and supports a salamander-caecilian relationship is presented and suggests a more recent (Mesozoic) origin for salamanders and caecilians directly linked to the initial breakup of the supercontinent Pangaea.
On the origin of and phylogenetic relationships among living amphibians
  • R. Zardoya, A. Meyer
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 2001
TLDR
Strong support of the Batrachia hypothesis from both molecule- and morphology-based studies provides a robust phylogenetic framework that will be helpful to comparative studies among the three living orders of amphibians and will permit better understanding of the considerably divergent vertebral, brain, and digit developmental patterns found in frogs and salamanders.
THE ORIGIN AND EARLY RADIATION OF TERRESTRIAL VERTEBRATES
TLDR
Adult anatomy and patterns of development in frogs and salamanders support their origin from different families of dissorophoid labyrinthodonts, and the ancestry of amniotes apparently lies among very early anthracosaurs.
New frog family from India reveals an ancient biogeographical link with the Seychelles
TLDR
A burrowing frog from India that is noticeably distinct from known taxa in all anuran families is found and recognized as a new family because of its very distinct morphology and an inferred origin that is earlier than several neobatrachian families.
Molecular synapomorphies resolve evolutionary relationships of extant jawed vertebrates
TLDR
This tree confirms that chondrichthyans are basal to all living gnathostomes, that lungfishes (Dipnoi) are the closest living relatives of tetrapods, and that bichirs are the living members of the most ancient family of ray-finned fishes.
Multiple overseas dispersal in amphibians
  • M. Vences, D. Vieites, A. Meyer
  • Environmental Science, Biology
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 2003
TLDR
The results provide the strongest evidence so far that overseas dispersal of amphibians exists and is no rare exception, although vicariance certainly retains much of its importance in explaining amphibian biogeography.
An Early Jurassic caecilian with limbs
TLDR
The discovery of an extensive series of Early Jurassic caecilians is reported which extends the fossil record of the group and reveals numerous features, including limbs, that are unknown among modern species.
Earliest known crown-group salamanders
TLDR
The discovery of well-preserved Middle Jurassic salamander from China constitutes the earliest known record of crown-group urodeles (living salamanders and their closest relatives) and provides evidence to support the hypothesis that the divergence of the Cryptobranchidae from the Hynobiidae had taken place in Asia before the Middle Jurassic period.
Recent Advances in the (Molecular) Phylogeny of Vertebrates
TLDR
A discussion of limitations of currently used molecular markers and phylogenetic methods as well as the contribution of molecular phylogenetic data to their resolution are presented.
...
...