Kingdom Animalia Linnaeus, 1758 - animals Phylum Nematoda Gegenbaur, 1859 - round worms Class Chromadorea Inglis, 1983 Subclass Plectia Hodda, 2007 Superorder Monhysterica Hodda, 2007 [monotypic] 1 Order Monhysterida Filipjev, 1929