Capsidless virus: These viruses don't produce virions, and cannot be assigned to the Baltimore classification in the strict sense. The polymerase shows homologies to dsRNA Durnavirales, but experimental data suggest that they can be considered ssRNA viruses "with dsRNA lifestyle".
Linear dsRNA genome of 6-10kb, encodes two to four ORFs . The 3'end is polyadenylated.
ORFB (and if present, ORFA) encodes a polyprotein that is proteolytically processed.
Poorly understood. The virus never buds out of its host and probably replicates in lipid pleomorphic vesicles like positive ssRNA virus replication viral manner. Transmission depends on cell-to-cell cytoplasmic exchange and hyphal anastomosis.