Diatom orders

The Naviculales are an order of diatoms.

Triceratiales is a order of diatoms.

Surirellales is an order of diatoms. It is paraphyletic to Rhopalodiales, which was merged into this order in the treatment of Ruck et al., 2016. If Rhopalodiales is to be restored, what is currently known as Surirellales will need to be split into two orders.

REDIRECT Biddulphiaceae

Cymatosirales is an order of diatoms, the only order in the superorder Cymatosirophycanae of the subclass Coscinodiscophycidae.

The Cymbellales are a diatom order in the class Bacillariophyceae. They include the following families: Anomoeoneidaceae Cymbellaceae Gomphonemataceae Rhoicospheniaceae

Eunotiales is a proposed order of diatoms, which belongs to superoder Eunotiophycanae.

Achnanthales is an order of diatoms.

REDIRECT Aulacoseiraceae

Mastogloiales is an order of algae belonging to the class Bacillariophyceae.