Previous hypotheses that position extant river dolphins, including Pontoporia , relative to other living odontocete lineages. Continued in Figure 2. Topologies based on combined analysis of morphology and molecules (A-C), morphology (D-I), and molecules (J-O) are shown. River dolphin lineages are colored red, and other branches are blue. Groupings that are commonly replicated in the various trees are labeled 1-9. For each topology, the following are shown: authors, date of publication, mode of analysis (P = parsimony, ML = maximum likelihood, NJ = neighbor joining distance, Bayes = Bayesian analysis, MRP = matrix representation with parsimony supertree, none = tree constructed manually), and data examined (morphology, mitochondrial [mt] genes, nuclear [nu] genes, mt genomes, source trees = published topologies used as input for MRP, SINEs = insertions of short interspersed nu elements). In the analysis of Yang and Zhou , Odontoceti was not supported as monophyletic (J).