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Electron micrograph of narcissus mosaic virus (NMV) filamentous virions
Virus classification Edit this classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Tymovirales

Tymovirales is an order of viruses with five families. The group consists of viruses which have positive-sense, single-stranded RNA genomes. Their genetic material is protected by a special coat protein.


Tymoviruses are mainly plant pathogens first described in 2004.[1] They are characterised by similarities in their replication-associated polyproteins. These account for the majority of their genomic coding capacity. They are considered to form a group, phylogenetically, referred to as flexiviruses, with filamentous virions.[2]


  1. ^ Adams MJ, Antinow JF, Bar-Joseph M, Brunt AA, Candresse T, Foster GD, Martelli GP, Milne RG, Fauquet CM (2004). "The new plant family Flexiviridae and assessment of molecular criteria for species demarcation". Arch Virol. 149 (5): 1045–60. doi:10.1007/s00705-004-0304-0. PMID 15098118. S2CID 34493607.
  2. ^ King 2012.


  • King, Andrew M. Q.; et al., eds. (2012). "Tymovirales". Virus taxonomy : classification and nomenclature of viruses : ninth report of the International Committee on Taxonomy of Viruses. London: Academic Press. p. 901. ISBN 978-0123846846. Retrieved 9 December 2014.

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