Sacoglossa Ihering, 1876 - sacoglossans
   Suborder Plakobranchacea Jensen, 1996 - non-shelled sacoglossans
     1 Superfamily Plakobranchoidea Gray, 1840
     1.0.1 Superfamily Placobranchoidea Gray, 1840, orth. inval. see Superfamily Plakobranchoidea Gray, 1840
     1.0.2 Superfamily Elysioidea H. & A. Adams, 1854 see Superfamily Plakobranchoidea Gray, 1840
     2 Superfamily Limapontioidea Gray, 1847
     2.0.1 Superfamily Polybranchioidea see Superfamily Limapontioidea Gray, 1847
     2.0.2 Superfamily Stiligeroidea Iredale & O'Donoghue, 1923 see Superfamily Limapontioidea Gray, 1847