see text Nepovirus is a genus of viruses in the order Picornavirales, in the family Secoviridae, in the subfamily Comovirinae.

[1][2] Nepoviruses, unlike the other two genera (Comovirus and Fabavirus) in the subfamily Comovirinae, are transmitted by nematodes.

[1] Nepoviruses are classified as type IV viruses under the Baltimore classification system, and consequently contain bipartite, linear, single stranded positive sense RNA genomes.

[3] The first segment (RNA1) is approximately 8,000 nucleotides in length and appears as a single copy in each B type virion.

[3] The second segment (RNA2) is approximately 4,000–7,000 nucleotides in length and usually appears as a single copy in each M type virion.