Figure 3.—

Evolutionary relationships merge when a species evolves by allopolyploidization, and a reticulate phylogeny can be constructed from well-supported nodes in the genealogies of RAG1 and RAG2 in Figure 1. The ploidy level follows each species name including three diploids indicated with daggers whose existence is predicted in the past but for whom an extant descendant with the same ploidy level is not known. Additionally, three tetraploid ancestors (each with 4x = 36), also indicated by daggers, are predicted but not known by an extant representative.