Fig. 2. SEM. Biflagellate stage. Peduncle deployed (arrow).
Fig. 3. SEM. Biflagellated stage with 2 size groups: large vegetative cell and small gamete cell. G=gamete; V=vegetative cell.
Fig. 4. SEM. Flagellated stage. Planozygote: larger triflagellate stage; similar to vegetative cell with 2 longitudinal flagella (arrows) adjacent to peduncle (P).
Fig. 6. SEM. Biflagellate stage. Plate sutures evident (arrows). Flagellar pores (arrowheads).
Fig. 7. SEM. Biflagellate stage. Apical view of APC: Po, cp, X plate. Thecal nodules apparent. APC=apical pore complex; cp=closing plate; Po=apical pore plate; X=canal plate.
Fig. 8. Line drawing. Apical view: epitheca with plate tabulation.
Fig. 9. Line drawing. Ventral view: plate tabulation and thecal nodules.
Fig. 10. Line drawing. Dorsal view: plate tabulation.
Fig. 11. Atlantic menhaden fish with open skin ulcers from Pamlico Estuary, NC.