Diatoms of North AmericaDiatoms of North America
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Compare Gomphoneis eriensis var. angularis

Kociolek and Stoermer 1988

Compare

This species is distinguished from G. eriense var. eriense and G. eriense var. variabilis by the trullate shape of the valve.

Gomphoneis trullata and G. herculeana var. loweii are larger taxa.

LM scalebar = 10 µm
Gomphoneis eriense var. angularis LM1 Gomphoneis eriense var. angularis LM4 Gomphoneis eriense var. angularis LM5 Gomphoneis eriense var. angularis LM2 Gomphoneis eriense var. angularis LM3
Length Range
34-67 µm
Width Range
8-12 µm
Striae in 10 µm
10-13 at the central portion, 14-16 at the poles

Gomphoneis eriense var. variabilis

Kociolek and Stoermer 1988

Gomphoneis eriense var variabilis LM3 Gomphoneis eriense var variabilis LM5 Gomphoneis eriense var variabilis LM2 Gomphoneis eriense var variabilis LM1 Gomphoneis eriense var variabilis LM4
Length Range
25-45 µm
Width Range
9.5-12 µm
Striae in 10 µm
10-13 in the center, 14-16 at the poles

Gomphoneis herculeana var. loweii

Kociolek and Stoermer 1988

Gomphoneis herculeana var. lowei LM6 Gomphoneis herculeana var. lowei LM1 Gomphoneis herculeana var. lowei LM4 Gomphoneis herculeana var. lowei LM2 Gomphoneis herculeana var. lowei LM3 Gomphoneis herculeana var. lowei LM5
Length Range
47-140 µm
Width Range
16-25 µm
Striae in 10 µm
8-12 in the central portion of the valve, 12-14 at the headpole, 13-16 at the footpole

Gomphoneis trullata

Kociolek and Stoermer 1986

Gomphoneis trullata LM1 Gomphoneis trullata LM6 Gomphoneis trullata LM3 Gomphoneis trullata LM5 Gomphoneis trullata LM7 Gomphoneis trullata LM4
Length Range
30-85 µm
Width Range
11-15 µm
Striae in 10 µm
10-14

Gomphoneis eriensis

(Grunow) Skvortzov in Skvortzov and Meyer 1928

Eriense Boyer T 5 14002 Eriense Boyer T 5 14006 Eriense Boyer T 5 14004 Eriense Boyer T 5 14003 Eriense Boyer T 5 14001
Length Range
25- 67 µm
Width Range
9.5-13.0 µm
Striae in 10 µm
12-16