DePaolis, J.
(2023).
Pinnunavis.
In Diatoms of North America.
Retrieved October 09, 2024, from https://diatoms.org/genera/pinnunavis
Symmetric Biraphid
Pinnunavis
Valves lanceolate to lanceolate-elliptic
Striae alveolate, radiate
Striae open (no chambers)
Vavles are lanceolate to lanceolate-elliptic. Striae are alveolate and radiate. The raphe is linear with expanded proximal raphe ends. Distal raphe ends are unilaterally hooked. The central area is may be expanded. The striae are open; there are no internal chambers as in Pinnularia and Caloneis, and therefore, no longitudinal lines....