Plate 42

Description:

Plate 42. Prorocentrum hoffmannianum. Figs. 1-4. SEM. Fig. 1. Right valve: cell ovoid, tapering slightly apically. Valve surface areolated, slightly concave. Curved apical collar (arrow). Fig. 2. Left valve: distinct flared apical collar bordering periflagellar area (arrowheads). Marginal areolae large. Intercalary band smooth. Fig. 3. Areolae round to ovoid with smooth margins. Some with small pores (arrows). Fig. 4. Periflagellar area: flagellar pore (f) surrounded by flared periflagellar collar (arrowheads), adjacent to auxiliary pore (a); pores equal in size. Fig. 5. LM. Left valve: central pyrenoid (arrow); posterior nucleus (n). Intercalary band appears striated (M.A. Faust). Fig. 6. Line drawing: areolae arrangement. (Figs. 1-4,6 after Faust 1990b)