History of the taxon:

Etymology of the name:

Taxon: Speroviridae Proposal: 2022.004A.Caudoviricetes_3nf.zip  ICTV Report:  Reference:  

from the Latin spero, meaning "hope", green (the colour of hope) referring to the green F420 autofluorescence of methanogenic archaea that host Methanobacterium virus C158, a member of the family; the suffix -viridae for family taxa