Taxonomic Ranks

The 2021 ICTV taxonomy release (#37) is now available online.

The new 2021 ICTV taxonomy is now available online at The new Master Species List #37 is available for download as an Excel Spreadsheet

This new release contains taxonomic changes approved by the ICTV Executive Committee in July, 2021 and ratified by the ICTV Membership in March, 2021. A paper describing this release will be published in the Virology Division News section of Archives of Virology:

Official taxonomy proposals documenting these and all other taxonomic changes approved by the ICTV since the publication of the 8th ICTV Report can be found at