The genus is distinguished on the basis of genetic characters.
No details are available on the morphology of virions.
Genome (Boros et al., 2015b): 8,003 nt (5′-UTR: 673 nt; ORF: 7,263 nt; 3′-UTR: 67 nt). The location of the cre has not been identified.
Genome organization and replication
The deduced polyprotein is of 2,420 amino acids. There is no L protein. The function 2A is unknown.
No virus has been isolated. Viral RNA was detected in faeces of a 5-week-old common kestrel (Falco tinnunculus).
Derivation of names
Harkavirus: from Harkakötöny (a village in Hungary where the first sample was collected)
Species demarcation criteria
There is only a single species in the genus.