Nemathelminthes Gegenbaur, 1859 see Phylum Nematoda Gegenbaur, 1859 Class Nematoda Gegenbaur, 1859 Subclass Penetrantia Order Enoplida Filipjev, 1929 Suborder Tripylina Andrassy, 1974 Family Prismatolaimidae Micoletzky, 1922