Plate 6

Description:

Plate 6. Alexandrium pseudogonyaulax. Figs. 1-4. LM. Fig. 1. Ventral view. Cell broadly pentagonal; wider than long. Epitheca short and dome-shaped. Hypotheca longer than epitheca. Cingulum shallow and barely displaced. Fig. 2. Dorsal view. Antapex obliquely concave. Fig. 3. Epitheca: ventral view. Apical pore plate (Po) with comma-shaped foramen. 1' plate pentagonal with large wide ventral pore (vp) on 4' plate margin. Fig. 4. Epitheca: apical view. 1' plate does not come in contact with Po. Po oval and longitudinal on apex. Figs. 5-6. Line drawings. Fig. 6. Po and 1' plate not in contact. Fig. 7. LM: isogamous gametes smaller and rounder than vegetative cells. Fig. 8. LM: round resting cyst. Fig. 9. SEM: paratabulate cyst.