Bacillariophyceae ( Class )

Bacillariophyceae

"Diatoms. Chrysophyta with double siliceous shells, the two halves of which fit together like a pillbox. They are sometimes motile by the secretion of mucilage fibrils along a specialized groove, the raphe. There are many extinct and 5,000 to 9,000 living species."
Biology of Plants, Fourth Edition, Worth Publishers Inc., Stanford University, Peter H. Raven and Helena Curtis, ©1971

Taxonomic Hierarchy
Kingdom	Chromista
Subkingdom	Chromista
Division	Bacillariophyta – diatoms, diatomées
Class	Bacillariophyceae
Direct Children:
Order	Achnanthales Silva
Order	Bacillariales Hendey
Order	Centrales
Order	Cymbellales D. G. Mann
Order	Eunotiales Silva
Order	Mastogloiales D. G. Mann
Order	Naviculales Bessey
Order	Pennales
Order	Rhopalodiales D. G. Mann
Order	Surirellales D. G. Mann
Order	Thalassiophysales D. G. Mann

References

Bacillariophyceae, Taxonomic Serial No.: 2287

Biology of Plants, Fourth Edition, Worth Publishers Inc., Stanford University, Peter H. Raven and Helena Curtis, ©1971