Navicula concentrica has more acute apices and the striae are radiate at the apices.
Navicula pseudolanceolata has narrower apices, where the striae are radiate to parallel.
Navicula pseudoppugnata has broadly rounded to cuneate apices, more widely spaced striae and a smaller central area.
Navicula novaesiberica has wedge-shaped apices and a higher density of areolae.
Diatoms of North America is running a fundraising campaign to keep the servers in operation. We need you to reach our $25,000 fundraising goal.
If you use and appreciate DONA, make your DONAtion today.
For the Gift Designation, type "diatom" in the search box and select "Diatom Lab Research Fund". This is the designated fund for diatoms.org.