This family consists of Phytoreovirus nonstructural proteins Pns10 and Pns11. Genome segment S11 of rice gall dwarf virus (RGDV), a member of Phytoreovirus encodes a putative protein of 40 kDa that exhibits approximately 37% homology at the amino acid level to the nonstructural proteins Pns10 of rice dwarf and wound tumour viruses, which are other members of Phytoreovirus.