The genus Gyrovirus was assigned to the family Anelloviridae in 2017 with only one recognized species, Chicken anemia virus. Over the last decade, many diverse viruses related to chicken anemia virus have been identified but not classified. Here, we provide a framework for the classification of new species in the genus Gyrovirus and communicate the establishment of nine new species. We adopted the 'Genus + freeform epithet' binomial system for the naming of these species.

Department of Biomedical Sciences and Veterinary Public Health Swedish University of Agricultural Sciences Uppsala Sweden

Department of Medicine and Surgery University of Insubria 21100 Varese Italy

Division of Virology Department of Infection and Immunity Jichi Medical University School of Medicine 3311 1 Yakushiji Shimotsuke shi Tochigi 329 0498 Japan

Equipe Biologie des Groupes Sanguins UMR 7268 ADES CNRS EFS Aix Marseille Université 27 Bd Jean Moulin 13005 Marseille France

Faculty of Veterinary Medicine University of Veterinary Sciences Brno Palackeho 1946 612 42 Brno Czech Republic

Structural Biology Research Unit Department of Integrative Biomedical Sciences University of Cape Town Cape Town 7925 South Africa

The Biodesign Center for Fundamental and Applied Microbiomics Center for Evolution and Medicine School of Life Sciences Arizona State University 1001 S McAllister Ave Tempe AZ 85287 5001 USA

The Roslin Institute and R SVS University of Edinburgh Easter Bush Midlothian EH25 9RG Scotland UK

Veterinary Medical Research Institute Hungária krt 21 1143 Budapest Hungary

WHO Collaborating Centre for Arbovirus and Haemorrhagic Fever Reference and Research Bernhard Nocht Institute for Tropical Medicine 20359 Hamburg Germany

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Anelloviridae taxonomy update 2023