Sacoglossa Ihering, 1876 - sacoglossans
   Suborder Plakobranchacea Jensen, 1996 - non-shelled sacoglossans
     Superfamily Plakobranchoidea Gray, 1840
       1 Family Plakobranchidae Gray, 1840
       1.0 Family Elysiidae Forbes & Hanley, 1851 see Family Placobranchidae Gray, 1840, orth. inval.
       2 Family Boselliidae Marcus, 1982
       3 Family Platyhedylidae Salvini-Plawen, 1973