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Cymbopleura amphicephala has elliptic, weakly dorsiventral valves with a small asymmetric central area and a filiform raphe. Cymbopleura anglica has larger valves with lower areola density of 24-28 in 10 ┬Ám. Cymbopleura sublanceolata has lanceolate valves.

LM scalebar = 10 µm
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

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 anglica

(Lagerstedt) Krammer 2003

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 sublanceolata

Krammer 2003

Cymbopleura sublanceolata LM1 Cymbopleura sublanceolata LM2 Cymbopleura sublanceolata LM3 Cymbopleura sublanceolata LM4 Cymbopleura sublanceolata LM5 Cymbopleura sublanceolata LM6 Cymbopleura sublanceolata LM7
Length Range
29-50 µm
Width Range
10.1-12.4 µm
Striae in 10 µm
12-16 at the valve center, 16-19 near the apices