Introduction

The virus order Bunyavirales was established in 2017 to accommodate related viruses with segmented, linear, single-stranded, negative-sense or ambisense RNA genomes classified into nine families [2]. Here, we present the changes that were proposed via an official ICTV taxonomic proposal (TaxoProp 2017.012M.A.v1.Bunyavirales_rev) at http://www.ictvonline.org/ in 2017 and were accepted by the ICTV Executive Committee (EC) in October 2018. These changes are now part of the official ICTV taxonomy as of October 2018.

Taxonomic changes at the order rank

In October 2018, the order Bunyavirales was amended by inclusion of the previously unassigned family Arenaviridae. The families Feraviridae, Jonviridae, and Tospoviridae were dissolved, and their genera (Orthoferavirus, Orthojonvirus, and Orthotospovirus) were renamed (Feravirus, Jonvirus, and Tospovirus, respectively) and moved into established families (Feravirus, JonvirusPhasmaviridae and TospovirusPeribunyaviridae). Three new families were created for novel invertebrate viruses: Cruliviridae for Wēnlǐng crustacean virus 9 (WlCV-9), Mypoviridae for Húběi myriapoda virus 5 (HbMV-5), and Wupedeviridae for Wǔhàn millipede virus 2 (WhMV-2) [4].

Taxonomic changes at the family rank

Fimoviridae

In 2018, no changes were made at the family rank.

Hantaviridae

In October 2018, the family was expanded by the addition of three new genera (Loanvirus, Mobatvirus, and Thottimvirus) for the species Longquan orthohantavirus, Laibin orthohantavirus, Nova orthohantavirus, Quezon orthohantavirus, Imjin orthohantavirus, and Thottapalayam orthohantavirus (now renamed Longquan loanvirus, Laibin mobatvirus, Nova mobatvirus, Quezon mobatvirus, Imjin thottimvirus, and Thottapalayam thottimvirus, respectively).

Nairoviridae

In October 2018, the family was expanded by the addition of two new genera, Shaspivirus and Striwavirus, for Shāyáng spider virus 1 (SySV-1) and Sānxiá water strider virus 1 (SxWSV-1) discovered in invertebrates, respectively [1, 4].

Peribunyaviridae

In October 2018, the family was expanded by the addition of the new genus Shangavirus for the species Shuangao insect herbevirus (now renamed Insect shangavirus).

Phasmaviridae

In October 2018, the family was expanded by the addition of the new genus Inshuvirus for the species Shuangao insect orthophasmavirus 2 (now renamed Insect inshuvirus) and the new genus Wuhivirus for Wǔhàn insect virus 2 (WhIV-2) discovered in invertebrates [1].

Phenuiviridae

In October 2018, the family was expanded by the addition of the new genus Banyangvirus for the species SFTS phlebovirus (now renamed Huaiyangshan banyangvirus) and the new genera Beidivirus, Horwuvirus, Hudivirus, Hudovirus, Mobuvirus, Pidchovirus, and Wubeivirus for Húběi diptera virus 3 (HbDV-3), Wǔhàn horsefly virus (WhHV), Húběi diptera virus 4 (HbDV-4), Húběi lepidoptera virus 1 (HbLV-1), Mothra virus (MTHV), Pidgey virus (PGYV), and Húběi diptera virus 5 (HbDV-5)/Wǔhàn fly virus 1 (WhFV-1), respectively, discovered in invertebrates [1, 3, 4].

Summary

A summary of the current, ICTV-accepted taxonomy of the order Bunyavirales is presented in Table 1.

Table 1 ICTV-accepted taxonomy of the order Bunyavirales as of October 2018. Listed are all bunyaviruses that are classified into species