Concise hierarchy

(Kingdom) Chromista - (Phylum) Ochrophyta - (Class) Bacillariophyceae

Phylogeny

Monophyletic

Ref: L.K. Medlin, 2016: 119.

Original position

Fragilariophyceae (Class) Round (1990)

Ref: F.E. Round et al., 1990: table 2 (p. 125).

Original entries

Ardissoneales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 127.
Climacospheniales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 128.
Cyclophorales (Order) Round & R.M. Crawford (1990)		Ref: F.E. Round et al., 1990: 128.
Fragilariales (Order) P.C.Silva (1962)		Ref: F.E. Round et al., 1990: 127.
Licmophorales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 127.
Plagiogrammales (Order) Round & R.M. Crawford (1990)		Ref: F.E. Round & R.M. Crawford, 1990: table 2 (p. 591).
Protoraphidales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 128.
Rhabdonematales (Order) Round & R.M. Crawford (1990)		Ref: F.E. Round et al., 1990: 127.
Rhaphoneidales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 127.
Striatellales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 128.
Tabellariales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 127.
Thalassionematales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 127.
Toxariales (Order) Round (1990)		Ref: F.E. Round et al., 1990: 127.

Current position

Bacillariophyceae (Class) Haeckel (1878)

Ref: L.K. Medlin, 2016: table 2 (p. 115); 13 Sep 2015.

Alternative positions

Bacillariophycideae (Class) Kingston (2003)	Ref: L.K. Medlin, 2016: 123. [misplaced]
Fragilariophyceae (Class) Round (1990)	Ref: F.E. Round et al., 1990: 125. [new taxon]

Historical positions

Bacillariophyceae (Class) Haeckel (1878)	Ref: L.K. Medlin, 2016: 122, 123, table 2 (p. 115), fig. 4.
Bacillariophycideae (Class) Kingston (2003)	Ref: L.K. Medlin, 2016: 123. [misplaced]
Fragilariophyceae (Class) Round (1990)	Ref: T. Koray, 2001: 16.
Diatomea (Infraphylum) Caval.-Sm. (1993)	Ref: T. Cavalier-Smith, 1993b: table 2 (p. 961). [invalid/synonym] [implicit]
Fragilariophyceae (Class) Round (1990)	Ref: F.E. Round et al., 1990: 125, 127, App. I (p. 651). [new taxon]
Fragilariophyceae (Class) Round (1990)	Ref: F.E. Round et al., 1990: 588.
Coscinopiscophyceae (Class)	Ref: L. Margulis et al., 1990: 590. [misplaced]

Number of Subtaxa

2025	Available in Systema Naturae 2000	7o;8f;45g;136s;1ss;54v
1989-present	Systema Naturae 2000: 26 Mar 2016	[7o;8f]
1990	F.E. Round et al.: 128	[12o;14f]
1990	F.E. Round et al.	[10o;13f]