Concise hierarchy

(Kingdom) Chromista - (Phylum) Retaria - (Class) Sphaerellaria - (Order) Actinommata

Current position

Actinommata (Order) Haeckel, 1862

Ref: M.S. Afanasieva & E.O. Amon, 2005: table 7 (p. S214).

Alternative positions

Actinommacea (Superfamily) Haeckel, 1862	Ref: P. De Wever et al., 2001: 119. [emended diagnosis]
Spumellaria (Suborder) Ehrenberg, 1875	Ref: K. Takahashi, 1991
Spumellaria (Order) Ehrenberg, 1875	Ref: D. Lazarus et al., 2015: table 1 (p. 306).

Historical positions

Spumellaria (Order) Ehrenberg, 1875	Ref: D. Lazarus et al., 2015: table 1 (p. 306).
Actinommata (Order) Haeckel, 1862	Ref: M.S. Afanasieva & E.O. Amon, 2005: S274-S275, table 7 (p. S214).
Actinommacea with double medullary shell ([unranked])	Ref: P. De Wever et al., 2001: 119-120. [emended diagnosis]
Spumellaria (Order) Ehrenberg, 1875	Ref: O.R. Anderson et al., 2000: 1002.
Spumellaria (Suborder) Ehrenberg, 1875	Ref: K. Takahashi, 1991
Spumellaria (Suborder) Ehrenberg, 1875	Ref: C. Nigrini & T.C. Moore Jr., 1979

Number of Subtaxa

2025	Available in Systema Naturae 2000	30g;52s;2ss; †14g;63s;3ss
1989-present	Systema Naturae 2000: 2 Oct 2018	[11g; †6g]
2015	D. Lazarus et al.: table 1 (p. 308)	[51g;102s;1ss; †21g;100s;5ss]
2005	M.S. Afanasieva & E.O. Amon: S275	[13*[2*][6]g[; †5g]]
2001	P. De Wever et al.: 121	[13*[9]g[; †4g]]