Since only one genus is currently recognized, the genus description corresponds to the family description.
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, Laodelphax striatella honeydew virus 1 and Laodelphax striatellus iflavirus 2 (related, unclassified species) are the same species. The Iflaviridae family is expanding rapidly and will likely undergo revision in the near future.