Family: Dicistroviridae

Genus: Cripavirus


Distinguishing features

Members of the Cripavirus genus exhibit the Type I intergenic untranslated region (IGR) internal ribosome entry site (IRES) structure (Jan et al. 2006).  The type I IRES is characterized by the presence of a conserved consensus bulge sequence (UGAUCU/UGC), absence of a third stem loop in Pseudoknot I, and the presence of a consensus sequence (UUAC) downstream of stem loop I. 


See discussion under family description

Genome organization and replication

See discussion under family description


See discussion under family description

Derivation of names

Cripa: derived from the name of the type species of the genus, Cricket paralysis virus

Species demarcation criteria

Sequence identity at the amino acid level between the capsid proteins of isolates and strains of a species is above 90%. Note that by this definition, Nilaparvata lugens C virus is a member of species Cricket paralysis virus

Related, unclassified viruses

Virus name

Accession number

Virus abbreviation

Anopheles C virus



goose faecal-sample dicistrovirus



Nilaparvata lugens C virus



Virus names and virus abbreviations are not official ICTV designations.