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Table 1 Statistical tests of alternative phylogenetic hypotheses

From: Reversal to air-driven sound production revealed by a molecular phylogeny of tongueless frogs, family Pipidae

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
  1. 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.