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.

Irisarri et al. BMC Evolutionary Biology 2011 11:114   doi:10.1186/1471-2148-11-114