Fragilariophyceae

Fragilariophyceae is a group of pennate diatoms lacking a raphe.

Examples
It includes the following genera:

Fragilariales

 * Ardissonea
 * Asterionella
 * Asterionellopsis
 * Catacombas
 * Diatoma
 * Fragilaria
 * Fragilariforma
 * Grammonema
 * Hyalosynedra
 * Neofragilaria
 * Opephora
 * Pseudostaurosira
 * Punctastriata
 * Staurosira
 * Staurosirella
 * Synedra
 * Synedropsis
 * Tabularia
 * Ulnaria

Striatellales

 * Hyalosira
 * Striatella
 * Toxarium

Other

 * Climacosphenia
 * Cyclophora
 * Delphineis
 * Protoraphis
 * Rhabdonema
 * Rhaphoneis
 * Tabellaria
 * Thalassionema