betaguttavirus betaguttavirus betaguttavirus is a genus of viruses, in the family guttaviridae. aeropyrum pernix archaea serve as natural hosts. there is only one species in this genus: aeropyrum pernix ovoid virus 1. betaguttavirus virus classification (unranked): virus realm: incertae sedis kingdom: incertae sedis phylum: incertae sedis class: incertae sedis order: incertae sedis family: guttaviridae genus: betaguttavirus structure viruses in the genus betaguttavirus are enveloped. the diameter is around 70-55 nm. genomes are circular. life cycle dna-templated transcription is the method of transcription. aeropyrum pernix archaea serve as the natural host. transmission routes are passive diffusion.