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Cocconeis klamathensis has continuous hyaline lines on either side of the axial area of the raphe valve and the valves are more arched.

LM scalebar = 10 µm
Cocconeis rugosa LM4 Cocconeis rugosa LM1 Cocconeis rugosa LM3
Length Range
19-65 µm
Width Range
12-55 µm
Striae in 10 µm
19-23

Cocconeis klamathensis

Sovereign 1958

Cocconeis klamathensis LM3 Cocconeis klamathensis LM4 Cocconeis klamathensis LM5 Cocconeis klamathensis LM2 Cocconeis klamathensis LM6 Cocconeis klamathensis LM7 Cocconeis klamathensis LM1
Length Range
15-44 µm
Width Range
12-28 µm
Striae in 10 µm
26-30