Family: Bidnaviridae (Interim Report)

This is a summary page created by the ICTV Report Editors using information from associated Taxonomic Proposals and the Master Species List.

Edited by: Arvind Varsani
Posted: November 2024, updated December 2024

Summary

The family Bidnaviridae includes ssDNA(+/-) viruses of invertebrates (Table 1 Bidnaviridae). The family Bidnaviridae was established in 2012 (Master Species List #26).

Table 1 Bidnaviridae. Characteristics of members of the family Bidnaviridae.

Characteristic	Description
Example	Bombyx mori bidensovirus (A: EU623082; B: EU623083), species Bombyx mori bidensovirus, genus Bidensovirus
Virion	Icosahedral particles, 25 nm in diameter (Figure 1 Bidnaviridae)
Genome	ssDNA(+/-); two linear ambisense segments with a total of 12.5–12.6 kb. The two segments are encapsidated separately (Figure 2 Bidnaviridae)
Replication	A rolling-hairpin mechanism
Translation	From capped and polyadenylated mRNA
Host range	Invertebrates
Taxonomy	Realm Monodnaviria, kingdom Shotokuvirae, phylum Cossaviricota, class Mouviricetes, order Polivirales: 1 genus, 1 species (Figure 3 Bidnaviridae)

Figure 1 Bidnaviridae. Schematic of virion. Image from ViralZone under a Creative Commons Attribution 4.0 International License, credit: SwissBioPics.

Figure 2 Bidnaviridae. Genome organisation of Bombyx mori bidensovirus, a member of the family Bidnaviridae. Boxes indicate open reading frames as annotated on GenBank accession A: EU623082; B: EU623083.

Figure 3 Bidnaviridae. Relationships of the taxa connected to the family Bidnaviridae.

Derivation of names

Bidensovirus: from the name Bombyx mori bidensovirus

Bidnaviridae: from the Latin bi meaning "two" and DNA for deoxyribonucleic acid, referring to the segmented ssDNA genomes of viruses in the family; the suffix -viridae for family taxa