Riboviria

Riboviria is a realm of viruses that includes all viruses that use a homologous RNA-dependent polymerase for replication. It includes RNA viruses that encode an RNA-dependent RNA polymerase, as well as reverse-transcribing viruses, with either RNA or DNA genomes, that encode an RNA-dependent DNA polymerase. The realm was established in 2018 to accommodate all RdRp-encoding RNA viruses and was expanded a year later to include the reverse-transcribing viruses. These two groups are assigned to two separate kingdoms: Orthornavirae for RdRp-encoding RNA viruses and Pararnavirae for reverse-transcribing viruses. Most identified eukaryotic viruses belong to the realm, including most human, animal and plant viruses.