[Kingdom] Animalia Linnaeus, 1758 - animals Grade Enterozoa Grade Cœlomata Phylum Nematoidea [Class] Nematoidea Rudolphi, 1808 see Phylum Nematoda Gegenbaur, 1859 [Family] Chætosomidæ nom. illeg. Genus Rhabdogaster Metschnikoff, 1867, nom. illeg. see Genus Epsilonema Steiner, 1927