Phylum Nematoda Potts 1932 (roundworm)
Synonym: Nemata
Parent taxon: Nematoidea according to H. Zhang et al. 2015
See also Edgecombe et al. 2011, Nielsen 2012, Sepkoski 2002 and Zrzavy et al. 1998
Sister taxon: Nematomorpha
Subtaxa: Anguillula Copalonema Enchytraeus Enoplea Ingenia Oxyurida Vetus