Diatoms of North AmericaDiatoms of North America
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Compare Cymbopleura subcuspidata

(Krammer) Krammer 2003

Compare

Cymbopleura apiculata has wider valves with a maximum length-to-width ratio of 3.3 and apiculate apices.

Cymbopleura anglica and C. naviculiformis are smaller with higher areola density.

LM scalebar = 10 µm
Cymbopleura subcuspidata LM1 Cymbopleura subcuspidata LM2 Cymbopleura subcuspidata LM3 Cymbopleura subcuspidata LM5 Cymbopleura subcuspidata LM6
Length Range
67-111 µm
Width Range
19-25 µm
Striae in 10 µm
9-12 (dorsal and ventral) at the valve center; 12-15 (dorsal) and 13-16 (ventral) at the apices

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 apiculata

Krammer 2003

Cymboapiculata1 Cymboapiculata2 Cymboapiculata3 Cymboapiculata4 Cymboapiculata5 Cymboapiculata6
Length Range
70-86 µm
Width Range
24-28 µm
Striae in 10 µm
8-10 (dorsal) and 9-11 (ventral) at the valve center; 13-15 (dorsal) and 14-16 (ventral) at the apices

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