Compare Navicula oblonga
Navicula oblonga is the only very large Navicula species in the U.S. that is linear in shape and lacks protracted ends. Navicula oblonga is distinguished from N. aurora and N. reinhardtii by linear valves, bent terminal striae, and simple proximal raphe ends. Navicula reinhardtii also has a transverse central area and coarser areolae. Navicula oblonga is commonly misidentified as a species of Pinnularia. It differs from Pinnularia by having lineate striae.
LM scalebar = 10 µm
Length Range
86-176 µm
86-176 µm
Width Range
15-19 µm
15-19 µm
Striae in 10 µm
7-9
7-9
Length Range
65-130 µm
65-130 µm
Width Range
18-28 µm
18-28 µm
Striae in 10 µm
7-9
7-9
Length Range
34-48 µm
34-48 µm
Width Range
14.5-17.0 µm
14.5-17.0 µm
Striae in 10 µm
8-9
8-9
