†unranked clade Echinozoa von Zittel 1895
Full reference: K. A. von Zittel. 1895. Grundzuge der Palaeontologie 1-971
Parent taxon: Eleutherozoa according to K. J. Peterson and D. J. Eernisse 2016
See also Boczarowski 2001, Squires 1984, Squires 1987, von Zittel 1895 and Webster et al. 2009
Sister taxon: Asterozoa
Subtaxa: Echinoidea Holothuroidea Ophiocistioidea