Figure 2.

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.