Figure 18 in Comparative osteology and phylogenetic relationships of Miocaperea pulchra, the first fossil pygmy right whale genus and species (Cetacea, Mysticeti, Neobalaenidae)

Figure 18. Phylogenetic relationships of baleen-bearing mysticetes resulting from the tree bisection and reconnection search and plotted against stratigraphic ages of the included taxa. Thick lines represent documented records; thin lines represent inferred ghost lineages. Ma, million years. The grey area represents a period of high origination rate in mysticete evolution. The divergence of Balaenidae and Neobalaenidae is calibrated on the stratigraphic age of Morenocetus parvus, the earliest described balaenid (the assignment to Balaenidae was confirmed by Bisconti, 2005).