Diatoms of North AmericaDiatoms of North America
Return to overview

Compare Pinnularia feremorosa

Metzeltin and Lange-Bert. 2007

Compare

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
Pinnularia feremorosa LM6 Pinnularia feremorosa LM1 Pinnularia feremorosa LM5 Pinnularia feremorosa LM7 Pinnularia feremorosa LM3 Pinnularia feremorosa LM4 Pinnularia feremorosa LM2
Length Range
59-79 µm
Width Range
8.0-8.7 µm
Striae in 10 µm
11-12

Pinnularia subgibba

Krammer 1992

Pinnularia subgibba LM7 Pinnularia subgibba LM4 Pinnularia subgibba LM2 Pinnularia subgibba LM1 Pinnularia subgibba LM5 Pinnularia subgibba LM6 Pinnularia subgibba LM3
Length Range
63-127 µm
Width Range
11.7-13.6 µm
Striae in 10 µm
8-9

Also compare to

Pinnularia elegantoides

Hustedt

Pinnularia guadalupensis

Manguin in Bourrelly & Manguin 1952

Pinnularia tenuistriata

Hustedt in Schmidt et al. 1934