Diatoms of North AmericaDiatoms of North America
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Compare Pinnularia marchica

Schönfelder in Krammer 2000

Compare

Pinnularia marchica has a less elliptic valve shape and much more capitate apices than P. krammeri. Pinnularia saprophila has a lower stria density and more linear valves. Pinnularia lunata has more divergent striae.

LM scalebar = 10 µm
Pinnularia marchica LM1 Pinnularia marchica LM2 Pinnularia marchica LM3 Pinnularia marchica LM4 Pinnularia marchica LM5 Pinnularia marchica LM6 Pinnularia marchica LM7
Length Range
11-20 µm
Width Range
4-5 µm
Striae in 10 µm
10-13

Pinnularia saprophila

Lange-Bert., H.Kobayasi and Krammer 2000

Pinnularia saprophila LM1 Pinnularia saprophila LM2 Pinnularia saprophila LM3 Pinnularia saprophila LM4 Pinnularia saprophila LM5 Pinnularia saprophila LM6 Pinnularia saprophila LM7
Length Range
22-45 µm
Width Range
5.2-6.7 µm
Striae in 10 µm
10-12

Also compare to

Pinnularia krammeri

Metzeltin in Lange-Bert. and Metzeltin

Pinnularia lunata

Krammer and Lange Bert.