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Monophyletic taxon: Subkingdom Hacrobia Okamoto, Chantangsi, Horák, Leander & Keeling, 2009 (protist)

Entity:

Concise hierarchy

(Kingdom) Chromista

Original position

Chromista (Kingdom) Caval.-Sm. (1981)

Ref: T. Cavalier-Smith, 2010a: 342, fig. 1.

Original entries

*Cryptista* (Phylum) Caval.-Sm. (1990), orth. inval.		Ref: T. Cavalier-Smith, 2010a: fig. 1.
*Haptophyta* (Phylum) D.J. Hibberd ex Edvardsen & Eikrem (2000)		Ref: T. Cavalier-Smith, 2010a: fig. 1.
*Heliozoa* (Phylum) Haeckel, 1866		Ref: T. Cavalier-Smith, 2010a: fig. 1.

Subsequent entries

Haptista (Phylum) Cavalier-Smith, 2003

Ref: T. Cavalier-Smith et al., 2015: table 1 (p. 344).

Current position

Chromista (Kingdom) Caval.-Sm. (1981)

Ref: T. Cavalier-Smith, 2022(2021): 582.

Historical positions

*Chromista* (Kingdom) Caval.-Sm. (1981)	Ref: T. Cavalier-Smith, 2022(2021): 511, App. (p. 582), fig. 11.
*Chromista* (Kingdom) Caval.-Sm. (1981)	Ref: T. Cavalier-Smith, 2022(2021) (alt.): table 2 (p. 564), fig. 11.
*Chromista* (Kingdom) Caval.-Sm. (1981)	Ref: T. Cavalier-Smith et al., 2015: 358-359, table 1 (p. 344).
*Chromista* (Kingdom) Caval.-Sm. (1981)	Ref: M.A. Ruggiero et al., 2015b: table 2 (p. 11).
*Chromista* (Kingdom) Caval.-Sm. (1981)	Ref: T. Cavalier-Smith, 2013(2012): 144.
*Chromista* (Kingdom) Caval.-Sm. (1981)	Ref: T. Cavalier-Smith, 2010a: 342, fig. 1. [new rank]

Number of Subtaxa

2025	Available in Systema Naturae 2000	2p;9c;19o;40f;102g;111s;11v; †5o;28f;137g;46s
1989-present	Systema Naturae 2000: 17 Sep 2015	[2p;11c]
2015	T. Cavalier-Smith et al.: table 1 (p. 344)	[2p;11c]
2015b	M.A. Ruggiero et al.: table 2 (p. 12)	[4p]

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Last updated: 21 Sep 2025