[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Abnidovirineae [monotypic]
         Family Abyssoviridae [monotypic]
           Subfamily Tiamatvirinae [monotypic]
             Genus Alphaabyssovirus [monotypic]
               1 Subgenus Aplyccavirus [monotypic]