root › Viruses › Riboviria › Orthornavirae › Pisuviricota › Duplopiviricetes › Durnavirales › Partitiviridae › unclassified Partitiviridae › Betapartitivirus › Betapartitivirus piheterobasidion › Heterobasidion partitivirus P › Heterobasidion annosum P-type partitivirus