protostomes see [unranked] Protostomia Grobben, 1908 Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929 Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans Parenchymia [Phylum] Platyhelminthes Gegenbaur, 1859 - flatworms