FIGURES 24–29: Thalassiosira dolmatovae, SEM. Figs. 24, 25 (enlarged fragment of Fig. 18), 27. Internal views of the valves showing central fultoportula (CF) and marginal strutted processes (MF) surrounded by 4 satellite pores, labiate processes (LP), and copula (C). Fig. 26. Internal view of the valve showing broken labiate processes (LP), central fultoportula (CF), and marginal strutted processes (black arrows). Fig. 28 (enlarged fragment of Fig. 17). External view of the valve with white arrows showing openings of simple occluded processes scattered on the valve face, and black arrow showing rounded opening of marginal strutted process. Fig. 29 (enlarged fragment of Fig. 15). External view of the valve with arrows showing outward extensions of marginal strutted processes with small rounded openings on their tops. Fig. 24, #CAS 60269-s. Figs. 25–26, 28–29, #CAS 608382. Fig. 27, #CAS 608400.