Figs. 7 a, b Entogonia briggeri n in Entogonia Briggeri N. Sp., A New Diatom Species From The Middle Miocene Of Romania And New Insights On The Fossil Marine Diatom Genus Entogonia Greville

Figs. 7 a, b Entogonia briggeri n. sp., sample 102m; SEM external view (a) and SEM internal view (b); a Valve face showing valve shape, round apices, elevations to poles and orifices, areolae pattern on inner and outer triangles; b Internal view showing the outer and inner triangles, internal costae of outer triangle, dense network of costae of the inner triangle, hyaline center of the inner triangle, the apices of the internal coil fusing to a siliceous punctate membrane within the orifice. Scale bars: 20 µm.