Diatoms of North AmericaDiatoms of North America
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Compare Planothidium lanceolatoides

(Sovereign) Lange-Bert. 1999

Compare

Planothidium apiculatum is very similar in size and shape and may be difficult to distinguish, especially the rapheless valves. The raphe valve has a rhomboid central area.

LM scalebar = 10 µm
Planothidium lanceolatoide LM1 Planothidium lanceolatoide LM2 Planothidium lanceolatoide LM4 Planothidium lanceolatoide LM3 Planothidium lanceolatoide LM7 Planothidium lanceolatoide LM6 Planothidium lanceolatoide LM5
Length Range
17-36 µm
Width Range
9-13 µm
Striae in 10 µm
11-14

Planothidium apiculatum

(R.M.Patrick) Lange-Bert. 1999

Planothidium apiculatum LM3 Planothidium apiculatum LM1 Planothidium apiculatum LM4 Planothidium apiculatum LM6 Planothidium apiculatum LM2 Planothidium apiculatum LM5 Planothidium apiculatum LM7
Length Range
25-31 µm
Width Range
9.0-12.7 µm
Striae in 10 µm
10-12