Mymonaviridae is a family of negative-strand RNA viruses in the order Mononegavirales, which infect fungi.

[1][2] Fungi serve as natural hosts.

The name is a portmanteau of Ancient Greek myco, which means fungus, and mononegavirales.

[3] This family was established to accommodate Sclerotinia sclerotiorum negative-stranded RNA virus 1 (SsNSRV-1) a novel virus discovered in a hypovirulent strain of Sclerotinia sclerotiorum.

[4][5] The following genera are recognized:[6]