The Tymovirales are a newly established order of viruses in the 2009 classification with four families. This group consists of viruses which have (+) sense single stranded RNA genomes without DNA intermediates. Their genetic material is protected by a special coat protein.
The Tymovirales are mainly plant pathogens first described in 2004. They are characterised by similarities in their replication-associated polyproteins. These account for the majority of their genomiccoding capacity. They are considered to form a group, phylogenetically, referred to as flexiviruses, with filamentous virions.
^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 149:1045– 1060