Subphylum Cephalochordata Haeckel 1866 (lancelet)
Parent taxon: Chordata according to R. C. Brusca et al. 2016
See also Dineley and Metcalf 1999, Edgecombe et al. 2011, Jaekel 1911, Nelson et al. 2016, Nielsen 2012, Nielsen 2012, Sepkoski 2002, Zhang 2011 and Zrzavy et al. 1998
Sister taxa: Metaspriggina, Olfactores, Pikaidae, Tunicata, Undichna, Vertebrata, Yunnanozoon
Subtaxa: Amphioxiformes Cathaymyrus Leptocardii Palaeobranchiostoma