DiatomBase
Between brackets is the number of accepted extant species
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Shows the number of accepted extant species within the taxon
The last expanded taxon is highlighted
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- Bacillariophyceae (5 958)
- Subclass Bacillariophyceae incertae sedis (189)
- Subclass Bacillariophycidae (4 408)
- Subclass Coscinodiscophycidae (878)
- Superorder Biddulphianae (230)
- Superorder Chaetocerotanae (95)
- Superorder Corethranae (1)
- Superorder Coscinodiscanae (300)
- Order Arachnoidiscales (4)
- Order Asterolamprales (24)
- Order Aulacoseirales (50)
- Order Chrysanthemodiscales
- Order Coscinodiscales (146)
- Order Ethmodiscales
- Order Melosirales (54)
- Order Orthoseirales (18)
- Family Orthoseiraceae Crawford (18)
- Genus Cavernosa S.R. Stidolph, 1990 accepted as Phycavernosa Blanco, 2020
- Genus Guarreraea Kociolek, Guerrero et Van de Vijver in Guerrero et al., 2018 (1)
- Genus Orthoseira G.H.K. Thwaites, 1848 (16)
- Genus Phycavernosa Blanco, 2020 (1)
- Order Paraliales (4)
- Order Stictocycales
- Order Stictodiscales
- Superorder Cymatosirophycanae (10)
- Superorder Lithodesmiophycanae (7)
- Superorder Rhizosolenianae (38)
- Superorder Thalassiosiranae (192)
- Order Arcanodiscales (5)
- Order Stictocyclales
- Subclass Fragilariophycidae (483)
- Order Centrales
