History of the taxon:

Etymology of the name:

Taxon: Mesoniviridae Proposal: 2017.012_015S.A.v1.Nidovirales.zip  ICTV Report:  Reference:  

from the Ancient Greek μέσος (mésos), meaning "middle", and Nidovirales, referring to the  genome size of viruses in the family, relative to other nidoviruses; the suffix -viridae for family taxa