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Monotypic taxon: Class Fragilariophyceae Round (1990) - araphid, pennate diatoms (alga)

Entity:

Concise hierarchy

(Domain) Eukaryota - (Phylum) Heterokontophyta

Original position

*Bacillariophyta* (Phylum) Engl. & Gilg (1919)		Ref: F.E. Round et al., 1990: table 2 (p. 125). [implicit]
*Bacillariophyta* (Division) Engl. & Gilg (1919)		Ref: F.E. Round et al., 1990: table 2 (p. 125).

Original entries

Fragilariophycidae (Subclass) Round (1990)

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

Current position

Diatomeae (Subphylum) Caval.-Sm. (1995)

[indirect]

Alternative positions

*Bacillariophyta* (Phylum) Engl. & Gilg (1919)	Ref: A.B. Doweld, 2001: LXXI.
*Bacillariophyta* (Division) Engl. & Gilg (1919)	Ref: F.E. Round et al., 1990: 125. [new taxon]

Historical positions

*Bacillariophyta* (Phylum) Engl. & Gilg (1919)	Ref: A.B. Doweld, 2001: LXXI.
*Eukaryota* ([unranked]) Chatton, 1925	Ref: T. Koray, 2001: 16. [rough position]
*Bacillariophyta* (Division) Engl. & Gilg (1919)	Ref: F.E. Round et al., 1990: 125, 127, App. I (p. 651). [new taxon]
*Bacillariophyta* (Phylum) Engl. & Gilg (1919)	Ref: F.E. Round et al., 1990: xiv, 588.

Number of Subtaxa

1989-present	Systema Naturae 2000	[1sc;12o;14f]
1990	F.E. Round et al.: 128	[1sc;12o;14f]
1990	F.E. Round et al.	[1sc;10o;13f]

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Last updated: 28 Aug 2026