Fragilariophyceae

{{Short description|Order of diatoms}}

{{Taxobox

| name = Fragilariophyceae

| image = Infinite order.jpg

| image_caption = Fragilaria through the microscope

| domain = Eukaryota

| unranked_regnum = SAR

| superphylum = Heterokonta

| classis = Bacillariophyceae

| ordo = Fragilariophyceae

}}

Fragilariophyceae is a group of pennate diatoms lacking a raphe.{{cite web |url=https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Tree&id=33853&lvl=3 |title=www.ncbi.nlm.nih.gov |access-date=2009-06-17}}