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
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. angularis LM1
Gomphoneis eriense var. angularis LM4
Gomphoneis eriense var. angularis LM5
Gomphoneis eriense var. angularis LM2
Gomphoneis eriense var. angularis LM3
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

Gomphoneis eriensis var. variabilis

Kociolek and Stoermer 1988

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 eriense var variabilis LM3 Gomphoneis eriense var variabilis LM5 Gomphoneis eriense var variabilis LM2 Gomphoneis eriense var variabilis LM1 Gomphoneis eriense var variabilis LM4

Gomphoneis herculeana var. loweii

Kociolek and Stoermer 1988

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 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

Gomphoneis trullata

Kociolek and Stoermer 1986

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

Gomphoneis eriensis

(Grunow) Skvortzov in Skvortzov and Meyer 1928

Length Range
25- 67 µm
Width Range
9.5-13.0 µm
Striae in 10 µm
12-16
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