Diatoms of North AmericaDiatoms of North America
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Compare Pinnularia lunata

Krammer and Lange-Bertalot 1999

Compare

Pinnularia divergentissima has striae that form an abrupt transition between being radiate in the central valve and convergent near the apices.

Pinnularia gibbiformis has continuous striae in the central area..

Pinnularia microstauron has narrower axial area.

LM scalebar = 10 µm
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 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 gibbiformis

Krammer 1992

Pinnularia gibbiformis ANSP 00404 02 Pinnularia gibbiformis ANSP 00404 05 Pinnularia gibbiformis ANSP 00404 01 Pinnularia gibbiformis ANSP 00404 03 Pinnularia gibbiformis ANSP NCPA0019 07 Pinnularia gibbiformis ANSP 00404 04 Pinnularia gibbiformis ANSP 00404 06
Length Range
40.7-48 µm
Width Range
5.8-6.8 µm
Striae in 10 µm
12

Pinnularia microstauron

(Ehrenb.) Cleve 1891

Pinnularia microstauron LM7 Pinnularia microstauron LM6 Pinnularia microstauron LM4 Pinnularia microstauron LM3 Pinnularia microstauron LM2 Pinnularia microstauron LM1
Length Range
27.7-81.3 µm
Width Range
7.2-12.2 µm
Striae in 10 µm
9-11