DiatomBase

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Between brackets is the number of accepted extant species

1 Click on "-" to collapse/hide all child taxa

2 Shows the number of accepted extant species within the taxon

3 The last expanded taxon is highlighted

4 Click on "+" to expand/show all child taxa

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Show accepted taxa only Only show main ranks

Bacillariophyceae (5 957)
Subclass Bacillariophyceae incertae sedis (189)
Subclass Bacillariophycidae (4 408)
Subclass Coscinodiscophycidae (877)
Superorder Biddulphianae (230)
Superorder Chaetocerotanae (95)
Superorder Corethranae (1)
Superorder Coscinodiscanae (300)
Order Arachnoidiscales (4)
Family Arachnoidiscaceae (4)
Genus Arachnodiscus J.W. Bailey ex C.G. Ehrenberg, 1849 accepted as Hemiptychus C.G. Ehrenberg, 1848
Genus Arachnoidiscus H. Deane ex G. Shadbolt, 1852 (4)
Genus Hemiptychus C.G. Ehrenberg, 1848 accepted as Arachnoidiscus H. Deane ex G. Shadbolt, 1852
Species Hemiptychus barbadensis (Schmidt in Schmidt et al.) Kuntze, 1898 accepted as Arachnoidiscus barbadensis Schmidt in Schmidt et al., 1881
Species Hemiptychus ehrenbergii (J.W. Bailey in Ehrenberg) Mann, 1907 accepted as Arachnoidiscus ehrenbergii f. ehrenbergii J.W. Bailey in Ehrenberg, 1849
Species Hemiptychus ehrenbergii (Bailey in Ehrenberg) Kuntze, 1898 accepted as Arachnoidiscus ehrenbergii f. ehrenbergii J.W. Bailey in Ehrenberg, 1849
Species Hemiptychus formosus Ehrenberg ex Arnott, 1858
Species Hemiptychus giganteus (Pantocsek) Kuntze, 1898 accepted as Arachnoidiscus giganteus Pantocsek, 1889
Species Hemiptychus grevillianus (Hardman ex Greville) Kuntze, 1898 accepted as Arachnoidiscus grevilleanus Hardman ex Greville, 1865
Species Hemiptychus indicus (Ehrenberg) Mann, 1907 accepted as Arachnoidiscus indicus var. indicus Ehrenberg, 1854
Species Hemiptychus indicus (Ehrenberg) Kuntze, 1898 accepted as Arachnoidiscus indicus var. indicus Ehrenberg, 1854
Species Hemiptychus ornatus Ehrenberg, 1848
Species Hemiptychus parvus (J.W. Bailey collection ex Habirshaw et al.) Kuntze, 1898 accepted as Arachnoidiscus parvus ‘J.W. Bailey' according to Chase, 1885
Species Hemiptychus rossicus (Pantocsek) Kuntze, 1898 accepted as Arachnoidiscus russicus Pantocsek, 1889
Species Hemiptychus simbirskianus (Pantocsek) Kuntze, 1898 accepted as Arachnoidiscus simbirscianus Pantocsek, 1892
Order Asterolamprales (24)
Order Aulacoseirales (50)
Order Chrysanthemodiscales
Order Coscinodiscales (146)
Order Ethmodiscales
Order Melosirales (54)
Order Orthoseirales (18)
Order Paraliales (4)
Order Stictocycales
Order Stictodiscales
Superorder Cymatosirophycanae (10)
Superorder Lithodesmiophycanae (7)
Superorder Rhizosolenianae (37)
Superorder Thalassiosiranae (192)
Order Arcanodiscales (5)
Order Stictocyclales
Subclass Fragilariophycidae (483)
Order Centrales