Higher classification Virus Group IV | Rank Order | |
Lower classifications Potato virus X, Apple chlorotic leafspot v, Papaya mosaic virus, Potato virus S, Cactus virus X | ||
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.
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Description
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 genomic coding capacity. They are considered to form a group, phylogenetically, referred to as flexiviruses, with filamentous virions.
Additional species
A new virus - Sclerotinia sclerotiorum deltaflexivirus 1 - has been described that appears to belong to a new genus in this family. The name Deltaflexiviridae has been proposed for this genus.
Another virus - Fusarium graminearum deltaflexivirus 1 - has been described.