Diatoms of North AmericaDiatoms of North America
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Compare Planothidium incuriatum

Wetzel, Van de Vijver and Ector 2013

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Planothidium biporomum has wider valve apices, while P. infrequens has lower stria density and apiculate apices.

LM scalebar = 10 µm
Planothidium Incuriatum LM4 Planothidium Incuriatum LM2 Planothidium Incuriatum LM3 Planothidium incuriatum LM1 Planothidium incuriatum LM2
Length Range
19-24 µm
Width Range
6.2-7.3 µm
Striae in 10 µm
13-15

Planothidium biporomum

(M.H.Hohn and Hellerman) Lange-Bert. 1999

Planothidium bipororum LM3 Planothidium bipororum LM1 Planothidium bipororum LM4
Length Range
12-25 µm
Width Range
5.4-7.0 µm
Striae in 10 µm
12-15