Frankovich, T.,
Sullivan, M.
(2022).
Seminavis.
In Diatoms of North America.
Retrieved May 01, 2026, from https://diatoms.org/genera/seminavis?x-craft-preview=cab8b13ef68d1e257235fd2491770f51dfe0c9a6c0ad3b95411776e5316d603alxhbyabypv
Asymmetric Biraphid
Seminavis
Valves strongly dorsiventral
Raphe displaced laterally
Lineolae present
Girdle bands hyaline
Valves are semi-lanceolate with a curved dorsal margin and a more or less straight ventral margin. The dorsal mantle is well developed, whereas the ventral mantle development is minimal. Areolae are lineolate, slit-like, and apically elongated, that is, they are lineolae. Internal hymenes are present. The dorsal and ventral striae are...