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, 2022. A paper describing this release has been published in the Virology Division News section of Archives of Virology: "Recent changes to virus taxonomy ratified by the International Committee on Taxonomy of Viruses (2022)", Walker PJ, Siddell SG, Lefkowitz EJ, Mushegian AR, Adriaenssens EM, Alfenas-Zerbini P, Dempsey DM, Dutilh BE, García ML, Curtis Hendrickson R, Junglen S, Krupovic M, Kuhn JH, Lambert AJ, Łobocka M, Oksanen HM, Orton RJ, Robertson DL, Rubino L, Sabanadzovic S, Simmonds P, Smith DB, Suzuki N, Van Doorslaer K, Vandamme AM, Varsani A, Zerbini FM.  Arch Virol. 2022 Nov;167(11):2429-2440. doi: 10.1007/s00705-022-05516-5. PMID: 35999326.

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