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Cymbopleura maggieae is more lanceolate and has a larger central area. Cymbopleura naviculiformis and C. sublanceolata have highly arched dorsal margins and narrower apices. Cymbopleura amphicephala and C. frequens are smaller.

LM scalebar = 10 µm
Cymbopleura linearis LM2 Cymbopleura linearis LM3 Cymbopleura linearis LM1 Cymbopleura linearis LM4 Cymbopleura linearis LM5 Cymbopleura linearis LM6 Cymbopleura linearis LM7
Length Range
32.0-43.3 µm
Width Range
8.3-9.1 µm
Striae in 10 µm
14-18

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 maggieae

L.L.Bahls 2014

Cymbopleura maggieae LM1 Cymbopleura maggieae LM2 Cymbopleura maggieae LM3 Cymbopleura maggieae LM4 Cymbopleura maggieae LM5 Cymbopleura maggieae LM6 Cymbopleura maggieae LM7
Length Range
33.5-46.4 µm
Width Range
7.9-9.6 µm
Striae in 10 µm
13-16 (dorsal), 15-18 (ventral), more widely spaced at valve center and closer together 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

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

Cymbopleura frequens

Krammer 2003

Cymbopleura frequens LM1 Cymbopleura frequens LM2 Cymbopleura frequens LM3 Cymbopleura frequens LM4 Cymbopleura frequens LM5 Cymbopleura frequens LM6
Length Range
19.6-43.5 µm
Width Range
7.5-9.0 µm
Striae in 10 µm
12-14 in the valve center, up to 16 near the apices