New taxonomy proposals for 2025 can now be submitted. Templates for submitting proposals are available from /taxonomy/templates. These 2025 templates MUST be used for all submissions. Please download all three files and read the Help file for detailed information on the submission process.
The deadline for proposal submission to Subcommittee Chairs is June 20, 2025.
Information on virus properties, the etymology of taxon names, and virion diagrams have all been updated to coincide with the new release of the virus taxonomy (MSL40).
Diagrams of virion morphology arranged by host and genome type at the family level provide an overview of the diversity of known forms. These diagrams are taken or adapted from the copyrighted ViralZone image library (ViralZone, SIB, Swiss Institute of Bioinformatics, https://viralzone.expasy.org)
This is a summary page created by the ICTV Report Editors using information from associated Taxonomic Proposals and the Master Species List.
Edited by: Luisa Rubino
Posted: March 2025
The family Tonesaviridae includes ssRNA(+) satellite viruses of plants (Table 1 Tonesaviridae). The family Tonesaviridae was established in 2025 (Master Species List #40).
This is a summary page created by the ICTV Report Editors using information from associated Taxonomic Proposals and the Master Species List.
Edited by: Luisa Rubino
Posted: March 2025
The family Tomosaviridae includes ssRNA(+) satellite viruses of plants (Table 1 Tomosaviridae). The family Tomosaviridae was established in 2025 (Master Species List #40).
This is a summary page created by the ICTV Report Editors using information from associated Taxonomic Proposals and the Master Species List.
Edited by: Luisa Rubino
Posted: March 2025
The family Pamosaviridae includes ssRNA(+) satellite viruses of plants (Table 1 Pamosaviridae). The family Pamosaviridae was established in 2025 (Master Species List #40).
This is a summary page created by the ICTV Report Editors using information from associated Taxonomic Proposals and the Master Species List.
Edited by: Arvind Varsani
Posted: November 2024, March 2025
A new version of the Virus Metadata Resource (VMR) spreadsheet (VMR_MSL40.v1.20250307.xlsx) has been released to coincide with release #40 of the Master Species List. This version, released on March, 7, 2025, can be downloaded from https://ictv.global/vmr/current. This release reflects the taxonomic changes incorporated into the new 2024 - 2025 virus taxonomy, provided in MSL40. This version corrects an error in the March 3 file in which 28 new species were missing from the VMR.
The new, 2024 ICTV taxonomy is now available through our taxonomy browser at https://ictv.global/taxonomy. This new version of Master Species List #40 is also available for download as an Excel Spreadsheet.
MSL40 contains taxonomic changes approved by the ICTV Executive Committee in July, 2024 and ratified by the ICTV Membership in February 2025. A paper describing this release is being prepared.
We are pleased to announce that Dr Stuart Siddell has been elected as a Life Member of the ICTV, following his nomination by the ICTV President and Data Sec
