Concise hierarchy

(Kingdom) Protoctista

Current position

Protoctista (Kingdom) Hogg, 1860

Ref: L. Margulis & K.V. Schwartz, 1998: 160-161.

Alternative positions

Chromista (Kingdom) Caval.-Sm. (1981)
Chromobionta (Infrakingdom)	Ref: E. Möhn, 1984
chromobionts ([unranked])	Ref: J.O. Corliss, 1984: abstract.
Chromophyta (Superphylum)	Ref: S.A. Karpov, 1990
Protista (Kingdom) (Haeckel, 1866)
Thallophyta ([unranked])

Historical positions

stramenopiles ([unranked]) Patterson, 1990, nom. vernac.	Ref: L. Margulis & K.V. Schwartz, 1998: 160-161.
Chromophyta (Superphylum)	Ref: S.A. Karpov, 1990
Protoctista (Kingdom) Hogg, 1860	Ref: M.N. Clayton, 1990: xiv, 698-714.
Plantae (Kingdom) Haeckel (1866)	Ref: R.C. van Caenegem et al., 1979-1984
chromobionts ([unranked])	Ref: J.O. Corliss, 1984: abstract.
Chromobionta (Infrakingdom)	Ref: E. Möhn, 1984
Protoctista (Kingdom) Hogg, 1860	Ref: L. Margulis & K.V. Schwartz, 1982: 96-97.
Plantae (Kingdom) Haeckel (1866)	Ref: R.H. Whittaker, 1969
Thallophyta ([unranked])	Ref: R. Wettstein, 1924: 61.

Number of Subtaxa

1989-present	Systema Naturae 2000	1,500s
1990	M.N. Clayton	1c
1982	L. Margulis & K.V. Schwartz: 96	1,500s