Chaetocerotophycidae is a grouping of

Coscinodiscophyceae The Coscinodiscophyceae are a class of diatoms. They are similar to the Centrales, a traditional, paraphyletic subdivision of the heterokont algae known as diatoms. The order is named for the shape of the cell walls (or valves or frustules) of ...

, previously known as "Centrales".

References

SAR supergroup suborders Coscinodiscophyceae {{Diatom-stub