Spaulding, S.
(2015).
Gomphosinica.
In Diatoms of North America.
Retrieved May 01, 2026, from https://diatoms.org/genera/gomphosinica?x-craft-preview=409442409a997390693ff24c7010fd6f1c96fb56f8f091fa016a63de9a54aaccecpiqubknd
Asymmetric Biraphid
Gomphosinica
Valves club-shaped
Striae composed of 2-3 rows of areolae
Stigma present
Internally, stigma covered by hood
Apical pore field present
Valves are clavate, or club-shaped, in valve view. In girdle view, frustules are cuneate. Striae are composed of 2-3 rows of areolae. Internally, the proximal raphe ends are unilaterally curved. A prominent stigma is present in the central area. Externally, the stigma has a round opening. Internally, the stigma has many small, round...