Tymoviridae is a family of single-stranded positive sense RNA viruses in the order Tymovirales.

[1][2] The family includes the following three genera:[2] Additionally, the following two species are not assigned to a genus:[2] The virions are non-enveloped and isometric with a diameter of around 30 nm, with an icosahedral structure and a triangulation number T=3.

[1] The linear genome is between of 6–7.5 kilobases in length[1] and encodes one large open reading frame.

The 3’ terminus may have a tRNA-like structure or a polyA tract, depending upon the species.

The virus exits the host cell by monopartite non-tubule guided viral movement.