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
References