Genus Chrysovirus

Type Species	Penicillium chrysogenum virus	(PcV)

Virion Properties

Morphology

Virions are isometric and 35-40  nm in diameter (Fig. 3).

Physicochemical and Physical Properties

Virion density in CsCl is 1.35  g/cm³ and S_20w is 145-150S.

Nucleic Acid

The virions typically contain three unrelated and separately encapsidated dsRNA segments of about 3  kbp each. Some virus isolates contain four dsRNA segments. The genomes are presumed to be bipartite and additional dsRNA segments are tentatively considered satellite or defective dsRNAs.

Proteins

The capsids are made up of single polypeptide species (Mr 125 10³). RNA polymerase activity is present.

List of Species Demarcation Criteria in the Genus

The criteria to differentiate species in the genus are:

	host range,
	size of dsRNA segments, and
	serological relationships.

List of Species in the Genus

Official virus species names are in italics. Tentative virus species names, alternative names ( ), strains or serotypes are not italicized. Virus names and assigned abbreviations ( ) are:

Species in the Genus

Penicillium brevicompactum virus	(PbV)
Penicillium chrysogenum virus	(PcV)
Penicillium cyaneo-fulvum virus	(Pc-fV)

Tentative Species in the Genus

Helminthosporium victoriae virus 145S	(HvV-145S)