Figure 1.

Maximum likelihood phylogenetic tree of the amino acid sequences of the RNA-dependent RNA polymerase (RdRp). The virus families are color-coded and the hosts for viruses within each group are indicated in the outermost circle. The six groups are identified in the legend and the boundaries of these groups are indicated in the outer ring of the phylogeny. Group I: Peribunyaviridae, Phenuiviridae, and Cruliviridae. Group II: Fimoviridae and Tospoviridae. Group III: Hantaviridae and Phasmaviridae. Group IV: Arenaviridae and Mypoviridae. Group V: Nairoviridae and Wupedeviridae. Group VI: Phenuiviridae, Leishbuviridae, and unassigned species. Clade validation is based on the approximate likelihood ratio test (aLRT)-Shimodaira–Hasegawa (SH)-like test values.