Diatoms of North AmericaDiatoms of North America
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Compare Nupela wellneri

(Lange-Bert. in Lange-Bert. and Krammer) Lange-Bert. in Rumrich, Lange-Bert. and Rumrich 2000

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Nupela impexiformis has distinctly capitate apices and lacks a raphe on one valve. Nupela paludigena has more linear valves and narrow axial area. Nupela tenuicephala has more linear valves and capitate ends.

LM scalebar = 10 µm
Nupela wellneri LM3 Nupela wellneri LM1 Nupela wellneri LM2
Length Range
8.5-15 µm
Width Range
3.0-4.5 µm
Striae in 10 µm
38-42

Nupela impexiformis

(Lange-Bert. in Lange-Bert. and Krammer) Lange-Bert. 1999

Nupela impexiformis LM7 Nupela impexiformis LM1 Nupela impexiformis LM3 Nupela impexiformis LM6 Nupela impexiformis LM5 Nupela impexiformis LM4 Nupela impexiformis LM2
Length Range
14-17 µm
Width Range
3.8-4.6 µm
Striae in 10 µm
44-50

Nupela tenuicephala

(Hust.) Lange-Bert. 1993

Nupela tenuicephala LM6 Nupela tenuicephala LM5 Nupela tenuicephala LM4 Nupela tenuicephala LM3 Nupela tenuicephala LM2 Nupela tenuicephala LM1
Length Range
11.3-15.6 µm
Width Range
2.7-3.3 µm
Striae in 10 µm
50-60

Also compare to

Nupela paludigena

(R.P.Scherer) Lange-Bert.