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Medlin and co-workers erected a new class, Mediophyceae (which could be re-ranked a subclass if diatoms as a whole are ranked as a class rather than a phylum) for the "polar centric" diatoms, which they consider to be more closely related to the pennate rather than to other centric diatoms, a concept which has been followed or further adapted ...
This classification was extensively overhauled by Round, Crawford and Mann in 1990 who treated the diatoms at a higher rank (division, corresponding to phylum in zoological classification), and promoted the major classification units to classes, maintaining the centric diatoms as a single class Coscinodiscophyceae, but splitting the former ...
Naviculaceae is a diatom family in the order Naviculales. Naviculaceae are typically composed of lineate areolae, one of the many forms of areolae. Some of the other areolae are punctate (Gomphoneis) and loculate (Diploneis). [1] These can be found among other families of diatoms including Thalassiosiraceae.
The order Pennales is a traditional subdivision of the heterokont algae known as diatoms. [1] [2] The order is named for the shape of the cell walls (or valves or frustules) of pennate diatoms, which are elongated in valve view.
Ethmodiscus is a genus of diatoms found widely scattered throughout the intertropical and temperate zones in the world's oceans. The large diatom genus can get up to 2mm in size, and it has distinct cell features like a vacuole that comprises over 99% of its cell's volume. [1]
Chaetoceros is a genus of diatoms in the family Chaetocerotaceae, first described by the German naturalist C. G. Ehrenberg in 1844. [1] Species of this genus are mostly found in marine habitats, but a few species exist in freshwater. [2] It is arguably the common and most diverse genus of marine planktonic diatoms, [3] with over 200 accepted ...
Coscinodiscus is a genus of centric diatoms in the family Coscinodiscaceae. It is the type genus of its family. There are over 200 species of Coscinodiscus. [1] Coscinodiscus argus Ehrenberg 1839 is the type species of this genus. [2]
Rhizosoleniaceae is a family of diatoms belonging to the order Rhizosoleniales. [1]Genera: [1] Calyptrella Castillo, 1996; Dactyliosolen A.F.Castracane, 1886; Guinardia H.Peragallo, 1892