Spaulding, S.
(2011).
Gomphosphenia.
In Diatoms of North America.
Retrieved December 03, 2024, from https://diatoms.org/genera/gomphosphenia
Asymmetric Biraphid
Gomphosphenia
Valves cuneate
Axial area broad
Raphe straight
Internal proximal raphe ends anchor-shaped
Valves are cuneate, and may have linear or undulate margins. Valves are never bent or flexed. The raphe is straight and filiform. Externally, both proximal and distal raphe ends are straight. Internally, the proximal raphe ends terminate in branched, anchor shaped fissures. Internally, the distal raphe terminates in a helictoglossa....