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Since only one genus is currently recognized, the genus description corresponds to the family description.
See discussion under family description.
Viruses belonging to different species are differentiated by genetic organization or genome expression, as well as by major differences in nucleic acid sequence identity. Thus, Cryphonectria hypovirus 1 (CHV1) differs from Cryphonectria hypovirus 2 (CHV2) in the presence or absence, respectively, of a papain-like proteinase in ORF A. CHV1 and CHV2 isolates share less than 60% overall aa sequence identity with each other. Cryphonectria hypovirus 3 (CHV3) and Cryphonectria hypovirus 4 (CHV4) each contain a single ORF, but isolates of the two species share less than 50% overall sequence identity. In addition, infection by CHV1 isolates results in a white or near-white phenotype in the fungus; CHV2 infection results in an orange-brown phenotype; CHV3 and CHV4 isolates have little effect on fungal pigment. Infection by members of any of the four species may reduce fungal virulence.
Sclerotinia sclerotiorum hypovirus 1-SZ-150
Sclerotinia sclerotiorum hypovirus 2-5472
Sclerotinia sclerotiorum hypovirus 2-SX247
Sclerotinia sclerotiorum hypovirus 2-Lactuca
Valsa ceratosperma hypovirus 1-MVC86
Phomopsis longicolla hypovirus 1-ME711
Fusarium graminearum hypovirus 1-HN10
Fusarium graminearum hypovirus 2-JS16
Fusarium langsethiae hypovirus 1-AH32
Macrophomina phaseolina hypovirus 1- Mp2003b
Agaricus bisporus virus 2-C19-C23-C1
Wuhan insect virus 14-WHZM10168
Beihai hypo-like virus 1-BHZC36965
Beihai sipunculid worm virus 6-BHNXC41400
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