Spaulding, S.,
Edlund, M.
(2009).
Gomphoneis.
In Diatoms of North America.
Retrieved May 01, 2026, from https://diatoms.org/genera/gomphoneis?x-craft-preview=cab8b13ef68d1e257235fd2491770f51dfe0c9a6c0ad3b95411776e5316d603alxhbyabypv
Asymmetric Biraphid
Gomphoneis
Valves clavate
Pseudoseptae present
Longitudinal lines may be present
Striae multiseriate
Valves are clavate in valve view and cuneate in girdle view. Valves are symmetric to the apical axis. Two distinct groups are currently included within the genus Gomphoneis.
One group contains species (including G. herculeana and G. eriense) with multiseriate striae crossed by longitudinal lines and with stigmata. The longitudinal lines...