Diatoms of North AmericaDiatoms of North America
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Compare Pinnularia divergentissima var. subrostrata

A.Cleve 1898

Compare

Pinnularia divergentissima has obtusely rounded, subrostrate to subcapitate apices.

Pinnularia perinterrupta has larger valves and flatly rounded apices.

Pinnularia lacunicola has larger valves and slightly protracted and obtusely rounded apices.

Pinnularia divergentissima var. minor has smaller valves.

Pinnularia divergentissima var. triundulata has triundulate margins.

LM scalebar = 10 µm
Pinnularia divergentissima subrostrata LM6 Pinnularia divergentissima subrostrata LM1 Pinnularia divergentissima subrostrata LM5 Pinnularia divergentissima subrostrata LM3 Pinnularia divergentissima subrostrata LM4 Pinnularia divergentissima subrostrata LM2 Pinnularia divergentissima subrostrata LM7
Length Range
28-38 µm
Width Range
5.5-6.1 µm
Striae in 10 µm
12-14

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 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 lacunicola

Patrick and Freese 1961

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

Also compare to

Pinnularia divergentissima var. minor

Krammer 1992

Pinnularia divergentissima var. triundulata

Krammer 2000