Viruses of this genus are distinguished from other hypoviruses based on polyprotein-derived phylogenetic trees.
Genome organization and replication
In general, monocistronic, positive-sense RNA genomes of 10.9 kb to 14.9 kb.
Species demarcation criteria
Members of different species are distinguished by the arbitrary threshold of less than 80% amino acid sequence identity in the whole RdRP-containing polyproteins.