Table 1.
Statistical tests of alternative phylogenetic hypotheses
| Phylogenetic hypotheses | -ln L | p value |
|---|---|---|
| Unconstrained tree | 154,788 | 0.96 |
| Phylogenetic position of Pipoidea within Anura | ||
| Pipoidea branching before Discoglossoidea | 154,827 | 0.001 |
| Pipoidea + Pelobatoidea | 154,836 | <0.001 |
| Pipoidea + Discoglossoidea | 154,822 | 0.003 |
| Monophyly of Archaeobatrachia | 154,870 | <0.001 |
| Internal relationships within Pipidae | ||
| (Xenopus + (Silurana + (Pipa + (Hymenochirus + Pseudhymenochirus)))) | 155,353 | <0.001 |
| ((Pipa + Hymenochirus) + (Xenopus + Silurana)) | 154,807 | 0.089 |
| Pseudhymenochirus basal in Pipidae | 155,07 | 0.021 |
| (Pseudhymenochirus + Hymenochirus) basal in Pipidae | 154,814 | <0.001 |
Results of approximately unbiased (AU) tests based on the combined dataset of mitochondrial and nuclear DNA sequences. P-values <0.05 (bold italics) indicate that the data allow rejection of the respective alternative hypothesis.