Included, by definition, in branch-based clade

Nephrozoa (Clade) Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002		Ref: U. Jondelius et al., 2002: 201 (abstract) ("bilaterians").
Planulozoa (Clade) Wallberg, Thollesson, Farris & Jondelius 2004		Ref: A. Wallberg et al., 2004: 560.

Original entries

†Siphusauctidae (Family) O'Brien & Caron, 2012

Ref: L.J. O'Brien & J.-B. Caron, 2012: 5. [implicit]

Current position

Planulozoa (Clade) Wallberg, Thollesson, Farris & Jondelius 2004

Ref: G. Giribet & G.D. Edgecombe, 2019: 168 (fig. 1a); Giribet & Edgecombe, 2019: fig. 1a.

Alternative positions

Acrosomata ([unranked]) Ax, 1996	Ref: K.J. Peterson & D.J. Eernisse, 2001: 172.
Animalia (Kingdom) Linnaeus, 1758	Ref: D.P. Gordon, 2009: 19.
Animalia ([unranked]) Linnaeus, 1758	Ref: K.J. Peterson & D.J. Eernisse, 2001: 172. [indirect]
Eumetazoa ([unranked]) Bütschli, 1910	Ref: E.J. van Nieukerken, 2010: 111.
Metazoa ([unranked]) Haeckel 1874	Ref: J. Baguñà & M. Riutort, 2004: 1052; Benton, 2015: fig. 1.6.
Triploblastica ([unranked])	Ref: E.E. Ruppert et al., 2004: fig. 8.15.

Historical positions

Planulozoa (Clade) Wallberg, Thollesson, Farris & Jondelius 2004	Ref: G. Giribet & G.D. Edgecombe, 2019: 168 (fig. 1c).
Metazoa ([unranked]) Haeckel 1874	Ref: M.J. Benton, 2015: fig. 1.6 (G. Edgecombe). [out of scope (coherent)]
Eumetazoa ([unranked]) Bütschli, 1910	Ref: E.J. van Nieukerken, 2010: 111.
Animalia (Kingdom) Linnaeus, 1758	Ref: D.P. Gordon, 2009: 19.
metazoans ([unranked]) Haeckel 1874	Ref: P. Vickers-Rich et al., 2007: 268.
Metazoa ([unranked]) Haeckel 1874	Ref: M.J. Benton, 2005: 2. [out of scope (coherent)]
Metazoa ([unranked]) Haeckel 1874	Ref: J. Baguñà & M. Riutort, 2004: 1052.
Triploblastica ([unranked])	Ref: E.E. Ruppert et al., 2004: figs. 8.15, 9.26A-B.
Acrosomata ([unranked]) Ax, 1996	Ref: K.J. Peterson & D.J. Eernisse, 2001: 172.
Triploblastica ([unranked])	Ref: C. Nielsen, 2001: 81-102, figs. 1.2, 9.1.
Eumetazoa ([unranked]) Bütschli, 1910	Ref: C. Nielsen, 1995

Number of Subtaxa

2025	Available in Systema Naturae 2000	26p;73c;503o;5748f;75,301g;208,988s;27,671ss;462v;1; ‡3o;15f;116g;517s;103ss;1v; †3p;58c;426o;2173f;9617g;3920s;97ss;1v
1989-present	Systema Naturae 2000	[28p]
2015	M.J. Benton: fig. 1.6 (G. Edgecombe)	[30p]
2010	E.J. van Nieukerken: 111	[28p]
2001	K.J. Peterson & D.J. Eernisse	[26p]
2000	G. Giribet et al.	[29p]
1995	C. Nielsen	[28p]