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Cymbopleura amphicephala and C. naviculiformis have smaller valves and striae with higher areola density. Cymbopleura amphicephala also has a filiform raphe, but the central area is smaller. Valves of C. naviculiformis are more narrow and more lanceolate.

LM scalebar = 10 µm
Cymbopleura anglica LM1 Cymbopleura anglica LM2 Cymbopleura anglica LM3 Cymbopleura anglica LM4 Cymbopleura anglica LM5 Cymbopleura anglica LM6 Cymbopleura anglica LM7
Length Range
39-52 µm
Width Range
13.0-18.2 µm
Striae in 10 µm
10-12 on the dorsal side in the valve center, slightly higher density on ventral side and near apices

Cymbopleura amphicephala

(Naegeli) Krammer 2003

Cymbopleura amphicephala LM1 Cymbopleura amphicephala LM2 Cymbopleura amphicephala LM3 Cymbopleura amphicephala LM4 Cymbopleura amphicephala LM5 Cymbopleura amphicephala LM6 Cymbopleura amphicephala LM7
Length Range
19.8-31.8 µm
Width Range
6.4-8.7 µm
Striae in 10 µm
12-16 at center valve, up to 18 at the ends

Cymbopleura naviculiformis

(Auersw.) Krammer 2003

Cymbopleura naviculiformis LM1 Cymbopleura naviculiformis LM2 Cymbopleura naviculiformis LM3 Cymbopleura naviculiformis LM5 Cymbopleura naviculiformis LM6
Length Range
35-40 µm
Width Range
9.1-11.4 µm
Striae in 10 µm
10-16 at center valve, 15-19 at the ends