Figure 2 : Phylogeny of physeteroids illustrating the relationships of Leviathan with other stem physeteroids, physeterids and kogiids.
From: The giant bite of a new raptorial sperm whale from the Miocene epoch of Peru
A maximum parsimony cladogram obtained with a PAUP (phylogenetic analysis using parsimony) branch-and-bound search, using a data set modified from previous works. The consistency (CI) and retention (RI) indices of the single shortest tree are 0.61 and 0.65, respectively. Schematic skulls illustrate the presence or absence of functional upper dentition in each taxon. Question marks indicate unknown condition. The daggers indicate extinct species. See Supplementary Information for further details.
