Compare

Cymbopleura incerta has lanceolate and distinctly dorsiventral valves with a narrower axial area. Cymbopleura incertiformis has linear elliptic-lanceolate valves and a narrower axial area.

LM scalebar = 10 µm
Cymbopleura metzeltinii LM3 Cymbopleura metzeltinii LM4 Cymbopleura metzeltinii LM5 Cymbopleura metzeltinii LM1 Cymbopleura metzeltinii LM2
Length Range
30-61 µm
Width Range
7.6-10.3 µm
Striae in 10 µm
15-17 at the valve center, 18-21 at the ends

Cymbopleura incerta

(Grunow) Krammer 2003

Cymboincerta2 Cymboincerta3 Cymboincerta5 Cymboincerta6 Cymboincerta7
Length Range
31-58 µm
Width Range
7.3-10.2 µm
Striae in 10 µm
15-16 at the valve center, 18-20 near the apices

Also compare to

Cymbopleura incertiformis

Krammer 2003