Phylum Gastrotricha
Parent taxon: Spiralia according to C. Nielsen 2012
See also Edgecombe et al. 2011 and Zrzavy et al. 1998
Sister taxa: Brachiozoa, Chaetognathifera, Gnathifera, Lophotrochozoa, Platyzoa, Schizocoela, Trochozoa
Subtaxa: Chaetonotida Macrodasydida