The family Botourmiaviridae includes viruses which infect plants and filamentous fungi with genomes of positive-sense single-stranded RNA (ssRNA) and are mono- or multi-segmented. There are four genera recognized in the family, namely, Ourmiavirus (plant viruses), Botoulivirus, Magoulivirus, and Scleroulivirus (fungal viruses), each with multiple species (Ayllon et al. 2020). The member viruses have genomes ranging from 2900 to 4800 nucleotides with positive-sense ssRNA genomes (Rastgou et al. 2009; Turina et al. 2017). It was observed that viruses infecting invertebrates of the family Narnaviridae have close similarity in having a naked ssRNA genome grouped into Narnavirus and Mitovirus. The virus genus of family Narnaviridae was originally characterized from fungi (Rodriguez-Cousiño et al. 1991; Polashock and Hillman 1994). It is believed that genes of Mitovirus have been once integrated into the genome of the plants (Bruenn et al. 2015), suggesting that they may have invaded plants sometimes earlier (Nibert et al. 2018). Chenopodium quinoa mitovirus 1 is reported to infect mitochondria of higher plants (Nerva et al. 2019). Recently, viruses which are phylogenetically related to Narnaviridae or Ourmiavirus were identified from insects or protozoans suggesting their widespread nature (Shi et al. 2016; Sukla et al. 2017). The natural hosts of this virus are cherry, cassava, and cucurbits (Turina et al. 2017).