Diatoms of North AmericaDiatoms of North America
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Compare Pinnularia clericii

(Freng.) Freng. 1933

Compare

Pinnularia boyeri is larger and has strongly capitate apices.

Pinnularia macilenta has a linear-lanceolate valve outline. The axial area and by the valve apices that are only slightly set-off.

LM scalebar = 10 µm
Pinnularia clericii LM5 Pinnularia clericii LM7 Pinnularia clericii LM1 Pinnularia clericii LM6 Pinnularia clericii LM4 Pinnularia clericii LM3 Pinnularia clericii LM2
Length Range
109-158 µm
Width Range
13.9-18.6 µm
Striae in 10 µm
7-9

Pinnularia macilenta

(Ehrenb.) Ehrenb. 1843

Pinnularia macilenta LM6 Pinnularia macilenta LM1 Pinnularia macilenta LM3 Pinnularia macilenta LM4 Pinnularia macilenta LM5 Pinnularia macilenta LM2 Pinnularia macilenta LM7
Length Range
71-124 µm
Width Range
14-16.5 µm
Striae in 10 µm
7-9

Also compare to

Pinnularia boyeri

BioData Reference
Patrick and Reimer 1966 Pl 60 Fig 8