Compare Pinnularia feremorosa
Pinnularia elegantoides differs by its swollen valve center and apices. P. guadalupensis has broader valves with wider a axial area. P. tenuistriata striae are parallel throughout entire valve. Varieties of P. subgibba with similar valve outlines have more rostrate/subcapitate/capitate apices and striae are radiate in the center. The granular axial area is unique to this species.
LM scalebar = 10 µm
Length Range
59-79 µm
59-79 µm
Width Range
8.0-8.7 µm
8.0-8.7 µm
Striae in 10 µm
11-12
11-12
Length Range
63-127 µm
63-127 µm
Width Range
11.7-13.6 µm
11.7-13.6 µm
Striae in 10 µm
8-9
8-9
