Majority rule (50%) consensus trees depicting living amphibian
relationships. Mitochondrial protein-coding, tRNA, and rRNA gene
sequences were combined into a single data set that was subjected to MP
(bootstrap values based on 500 bootstrap pseudoreplications; upper
value of each triplet of numbers), NJ (bootstrap values based on 500
bootstrap pseudoreplications; middle value of each triplet of numbers),
and ML (quartet puzzling support values based on 1,000 puzzling steps;
lowest value of each triplet of numbers) analyses. Lobe-finned fishes
(lungfish and coelacanth) were used as outgroup taxa.