Orthornavirae
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Orthornavirae is a kingdom of viruses that have genomes made of ribonucleic acid, including genes which encode an RNA-dependent RNA polymerase. The RdRp is used to transcribe the viral RNA genome into
Phylogenetic tree with phylum branches highlighted. Negarnaviricota (brown), Duplornaviricota (green), Kitrinoviricota (pink), Pisuviricota (blue), and Lenarviricota (yellow)
Lassa virus (Arenaviridae)
Lymphocytic choriomeningitis virus (Arenaviridae)
Hantavirus (Hantaviridae)
Riboviria
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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 a
Orthornavirae
…which promote rapid evolution, including high rates of genetic mutation, recombination, and reassortment. Viruses in Orthornavirae belong to the realm Riboviria. They are descended from a common ancestor. The kingdom is subdivided into seven phyla that separate member viruses based on their genome type, host…
Colourized transmission electron micrograph of SARS-CoV-2, the cause of the COVID-19 pandemic and a ribovirian.
Transmission electron micrograph of Tobacco mosaic virus, the first virus to be discovered and a ribovirian.