Concise hierarchy

(Kingdom) Chromista

Phylogeny

Polyphyletic (poly)

Ref: K.A. Mikrjukov et al., 2000: 860.

Subsequent positions

Actinopoda (Parvkingdom) Calkins, 1902		Ref: T. Cavalier-Smith, 1993b: table 4 (p. 972).
Hacrobia (Subkingdom) Okamoto, Chantangsi, Horák, Leander & Keeling, 2009		Ref: T. Cavalier-Smith, 2010a: fig. 1.

Subsequent entries

Centrohelea (Class) Kühn, 1926		Ref: T. Cavalier-Smith, 1993b: 988, table 4 (p. 972).
Nucleohelea (Class) Cavalier-Smith, 1993		Ref: T. Cavalier-Smith, 1993b: table 4 (p. 972).

Current position

Hacrobia (Subkingdom) Okamoto, Chantangsi, Horák, Leander & Keeling, 2009

Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 12).

Alternative positions

Actinopoda (Infrakingdom) Calkins, 1902	Ref: T. Cavalier-Smith, 1998: 233.
Actinopoda (Superphylum) Calkins, 1902	Ref: S.A. Karpov, 1990
Actinopoda (Parvkingdom) Calkins, 1902	Ref: T. Cavalier-Smith, 1993b: table 4 (p. 972). [new position]
actinopods ([unranked])	Ref: J.O. Corliss, 1984: abstract.
Biciliata (Subkingdom)	Ref: T. Cavalier-Smith, 2004: 1252.
Chromista (Kingdom) Caval.-Sm. (1981)	Ref: O. Bánki et al., 2023: 17 Aug 2023.
Protozoa (Kingdom) Goldfuss, 1818	Ref: T. Cavalier-Smith, [1991(ined.?)]
Rhizaria (Infrakingdom) Cavalier-Smith, 2002	Ref: T. Cavalier-Smith, 2002b: 326.

Historical positions

Chromista (Kingdom) Caval.-Sm. (1981)	Ref: T. Rees et al., 2020: table 2 (p. 129).
Hacrobia (Subkingdom) Okamoto, Chantangsi, Horák, Leander & Keeling, 2009	Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 12).
Hacrobia (Subkingdom) Okamoto, Chantangsi, Horák, Leander & Keeling, 2009	Ref: T. Cavalier-Smith, 2010a: 342, fig. 1. [new position]
Biciliata (Subkingdom)	Ref: T. Cavalier-Smith, 2004: 1252.
Rhizaria (Infrakingdom) Cavalier-Smith, 2002	Ref: T. Cavalier-Smith, 2002b: 326.
amoeboid protists ([unranked])	Ref: K.A. Mikrjukov et al., 2000: 860-861.
Actinopoda (Infrakingdom) Calkins, 1902	Ref: T. Cavalier-Smith, 1998: table 3 (p. 233).
Actinopoda (Parvkingdom) Calkins, 1902	Ref: T. Cavalier-Smith, 1993b: 985, 988, table 4 (p. 972). [new position]
Protozoa (Kingdom) Goldfuss, 1818	Ref: T. Cavalier-Smith, [1991(ined.?)]
Actinopoda (Superphylum) Calkins, 1902	Ref: S.A. Karpov, 1990
actinopods ([unranked])	Ref: J.O. Corliss, 1984: abstract.

Number of Subtaxa

1989-present	Systema Naturae 2000	[[1-]2c]
2020	T. Rees et al.: table 2 (p. 129)	30ng;22[-23]g; †0g
2002b	T. Cavalier-Smith: 326	[[1-]2c]
1993b	T. Cavalier-Smith: table 4 (p. 972)	[2c;4o]