Cymbopleura hybrida has more linear valves, rostrate to subrostrate apices, and sloping shoulders. Cymbopleura similis and C. similiformis have smaller valves. Encyonopsis descripta and other species of Encyonopsis have dorsally deflected proximal raphe ends and ventrally deflected distal raphe ends.

LM scalebar = 10 µm
Cymbopleura elliptica LM1 Cymbopleura elliptica LM2 Cymbopleura elliptica LM3 Cymbopleura elliptica LM4 Cymbopleura elliptica LM5 Cymbopleura elliptica LM6 Cymbopleura elliptica LM7
Length Range
38-49 µm
Width Range
10.8-11.9 µm
Striae in 10 µm
10-13 at the valve center, 15-16 near the apices

Cymbopleura hybrida

(Grunow) Krammer 2003

Cymbopleura hybrida LM1 Cymbopleura hybrida LM2 Cymbopleura hybrida LM3 Cymbopleura hybrida LM4 Cymbopleura hybrida LM5 Cymbopleura hybrida LM6 Cymbopleura hybrida LM7
Length Range
29.7-48.3 µm
Width Range
6.9-8.1 µm
Striae in 10 µm

Encyonopsis descripta

(Hust.) Krammer 1997

Encyonopsis Descripta3 Encyonopsis Descripta7 Encyonopsis Descripta6 Encyonopsis Descripta1 Encyonopsis Descripta2
Length Range
25.7-29.9 µm
Width Range
5.4-6.6 µm
Striae in 10 µm
18-20 at valve center, 20-22 near the apices

Also compare to

Cymbopleura similis

(Krasske) Krammer 2003

Cymbopleura similiformis

Krammer 2003