Nupela fennica and N. elegantula lack capitate apices. Nupela impexiformis and N. wellneri have lanceolate or elliptic-lanceolate valves, with distinctly convex, rather than parallel, margins. Valves of N. giluwensis are narrowly elliptic, and not linear-lanceolate. Valves of N. schoemaniana have a very small central area and subcapitate apices.

LM scalebar = 10 µm
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

Nupela fennica

(Hust.) Lange-Bert. 2004

Gs024284  Nufennica 7 Ed Ih 020665  Nufennica 1 Ed Gs024284  Nufennica 6 Gs024284  Nufennica 3 Ed Gs024284  Nufennica 8
Length Range
9-18 µm
Width Range
2.7-3.5 µm
Striae in 10 µm

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

Nupela wellneri

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

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

Nupela elegantula

Potapova 2011

Nupela elegantula LM1 Nupela elegantula LM4 Nupela elegantula LM2 Nupela elegantula LM3 Nupela elegantula LM5
Length Range
12-26 µm
Width Range
3.1-4.0 µm
Striae in 10 µm

Also compare to

Nupela giluwensis

Vyverman and Compère 1991

Nupela schoemaniana

Lange-Bert. 1993