Viruses assigned to the genus Caligrhavirus form a distinct monophyletic group based on well-supported Maximum Likelihood or Maximum Clade Credibility trees inferred from complete L sequences. Viruses assigned to the genus have been detected in sea lice (Copepoda: Caligidae).
Viruses assigned to the genus Alphanemrhavirus form a distinct monophyletic group based on well-supported Maximum Likelihood or Maximum Clade Credibility trees inferred from complete L sequences. Viruses assigned to the genus have been detected in parasitic nematodes (roundworms of the phylum Nematoda). They are distinct phylogenetically from viruses assigned to the genus Betanemrhavirus.
Viruses assigned to the genus Tupavirus form a distinct monophyletic group based on well-supported Maximum Likelihood or Maximum Clade Credibility trees inferred from complete L sequences. Tupaviruses infect mammals and birds. The genome organisation features an alternative long ORF (Px or C) in the P gene and a gene encoding a small hydrophobic protein (U1 or SH) between the M gene and the G gene.
