FIG. 9 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec

FIG. 9. — SEM images of Kobayasiella micropunctata (Germain) Lange-Bertalot: A, B, external views of the complete valve; C, external view of the central area showing the multiseriate poroid covers over the striae between virgae; D, external view of the valve apex showing a hooked terminal fissure opening into an irregular surface depression; E, internal view of the apex with magnified view of the terminal elongated helictoglossa; F, internal view of a copula showing two rows of pores occluded with small round pores. Scale bars: A, B, 5 µm; C, D, 2 µm; E, 1 µm; F, 500 nm.