Diatoms of North AmericaDiatoms of North America
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Compare Pinnularia lacunicola

Patrick and Freese 1961

Compare

Pinnularia divergentissima has more defined "shoulders".

Pinnularia birnirkiana is greater in length and width, and has a lower stria density.

Pinnularia lunata has a fascia that is less rhomboid.

Pinnularia perinterrupta has capitate apices.

LM scalebar = 10 µm
Pinnularia lacunicola LM5 Pinnularia lacunicola LM1 Pinnularia lacunicola LM2 Pinnularia lacunicola LM3 Pinnularia lacunicola LM6 Pinnularia lacunicola LM4 Pinnularia lacunicola LM7
Length Range
33-55 µm
Width Range
6.6-10.2 µm
Striae in 10 µm
11-15

Pinnularia divergentissima

(Grunow) Cleve 1895

Pinnularia divergentissima LM6 Pinnularia divergentissima LM5 Pinnularia divergentissima LM4 Pinnularia divergentissima LM3 Pinnularia divergentissima LM2 Pinnularia divergentissima LM1
Length Range
28-46 µm
Width Range
5.0-7.0 µm
Striae in 10 µm
12-14

Pinnularia lunata

Krammer and Lange-Bertalot 1999

Pinnularia lunata LM2 Pinnularia lunata LM6 Pinnularia lunata LM4 Pinnularia lunata LM7 Pinnularia lunata LM3 Pinnularia lunata LM1 Pinnularia lunata LM5
Length Range
43-60 µm
Width Range
6.9-8.7 µm
Striae in 10 µm
11-12

Pinnularia perinterrupta

Krammer 2000

Pinnularia perinterrupta LM3 Pinnularia perinterrupta LM7 Pinnularia perinterrupta LM1 Pinnularia perinterrupta LM5 Pinnularia perinterrupta LM2 Pinnularia perinterrupta LM6 Pinnularia perinterrupta LM4
Length Range
31.4-37.5 µm
Width Range
6.5-7 µm
Striae in 10 µm
12-13

Pinnularia birnirkiana

Patrick and Freese 1961

Pinnularia birnirkiana LM3 Pinnularia birnirkiana LM5 Pinnularia birnirkiana LM2 Pinnularia birnirkiana LM4 Pinnularia birnirkiana LM6 Pinnularia birnirkiana LM1 Pinnularia birnirkiana LM7
Length Range
28.1-54.3 µm
Width Range
9.3-11.1 µm
Striae in 10 µm
10-12