Naviculaceae

{{Short description|Family of diatoms}}

{{Automatic taxobox

| image = Navicula oblonga 115647672.jpg

| image_caption = Navicula oblonga

| taxon = Naviculaceae

| authority = Kützing, 1844

| subdivision_ranks = Genera

| subdivision = See text

}}

Naviculaceae is a diatom family in the order Naviculales.

Naviculaceae are typically composed of lineate areolae, one of the many forms of areolae. Some of the other areolae are punctate (Gomphoneis) and loculate (Diploneis).{{Cite web|url=https://diatoms.org/glossary/areola|title=Areola {{!}} Glossary - Diatoms of North America|website=diatoms.org|language=en-US|access-date=2019-06-11}} These can be found among other families of diatoms including Thalassiosiraceae. The areolae found in Naviculaceae tend to be uniseriate. Some Naviculaceae tend to have a pseudoseptum which is a silica plate extending internally from the apical portion of the valve. To contrast, a pseudoseptum is part of a valve while a septum is part of a copula, or girdle band. For example, the pseudoseptum occurs in some species of Gomphonema, Gomphoneis, Stauroneis and Navicula. The plural is pseudosepta.{{Cite web|url=https://diatoms.org/glossary/pseudoseptum|title=Pseudoseptum {{!}} Glossary - Diatoms of North America|website=diatoms.org|access-date=2019-06-11}}