Dates, nodes and character conflict: Addressing the Lissamphibian origin problem

@article{Ruta2007DatesNA,
  title={Dates, nodes and character conflict: Addressing the Lissamphibian origin problem},
  author={Marcello Ruta and Michael I. Coates},
  journal={Journal of Systematic Palaeontology},
  year={2007},
  volume={5},
  pages={122 - 69}
}
  • M. RutaM. Coates
  • Published 1 January 2007
  • Biology
  • Journal of Systematic Palaeontology
Synopsis Extant amphibians consist of Salientia (frogs), Caudata (salamanders), and Gymnophiona (caecilians). The mutual relationships of these groups are controversial, with either Batrachia (Salientia + Caudata) or Procera (Gymnophiona + Caudata) as emerging clades in recent molecular and morphological analyses. The monophyly of amphibians as a whole is supported by independent data, but their origins and affinities with early tetrapods are debated. A new cladistic analysis of early tetrapods… 

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References

SHOWING 1-10 OF 172 REFERENCES

Monophyly and affinities of albanerpetontid amphibians (Temnospondyli; Lissamphibia)

Albanerpetontids are better interpreted not as aberrant caudates, but as a distinct clade of lissamphibians in which numerous apomorphies are superimposed upon an otherwise primitive lissampshibian body plan.

THE PALEOZOIC RELATIVES OF LISSAMPHIBIANS

The balance of evidence favors a monophyletic origin of all lissamphibians from within the tem- nospondyls but the number of character states involved is not so great that this theory can be considered robust.

On the origin of and phylogenetic relationships among living amphibians

  • R. ZardoyaA. Meyer
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 2001
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.

Ontogenetic evidence for the Paleozoic ancestry of salamanders

Comparison of patterns of larval development in Paleozoic and modern amphibians provides a means to test previous phylogenies based primarily on adult characteristics and proves to be highly informative in the case of the origin of salamanders.

Molecular evidence for the early history of living amphibians.

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.

Initial Diversification of Living Amphibians Predated the Breakup of Pangaea

A robust molecular phylogeny based on the nuclear RAG1 gene as well as results from a variety of alternative independent molecular clock calibrations suggest that the origin and early divergence of the three living amphibian orders dates back to the Palaeozoic or early Mesozoic, before the breakup of Pangaea, and soon after the divergence from lobe‐finned fishes.

Dissorophoid relationships and ontogeny, and the origin of the Lissamphibia

  • J. Bolt
  • Biology, Environmental Science
  • 1977
A three-stage dentitional ontogenetic sequence for Doleserpeton and Tersomius is proposed, in which the third (adult) phase is similar to the adult of most other labyrinthodonts, the second (juvenile) phase resembles the adult condition in lissamphibians whereas the hypothetical first (larval)phase resembles the larvae of salamanders and oviparous caecilians.

Archaeobatrachian paraphyly and pangaean diversification of crown-group frogs.

To explore central controversies on the phylogeny of Anura, nearly 4000 base pairs of mitochondrial and nuclear DNA for the major frog lineages are analyzed and likelihood-based analyses are congruent with morphological evidence in supporting a paraphyletic arrangement of archaeobatrachian frogs.

A stem‐group caecilian (Lissamphibia: Gymnophiona) from the Lower Cretaceous of North Africa

This material represents the second oldest record for the caecilians, after the Jurassic Eocaecilia of North America, and the earliest caecilian record for Gondwana, and forms the basis of a new genus, Rubricacaecilia.
...