Fig. 2. SEM. Dorsal view. Apical groove extends to dorsal side of epitheca creating a slight indentation at apex (arrowhead). Hypotheca bilobed.
Fig. 3. LM. Cingulum deeply incised. Sulcus widens as descends towards antapex.
Fig. 4. LM. Cingulum displaced 2X its width (arrows).
Fig. 5. LM. Large nucleus in left lobe of hypotheca. N=nucleus.
Fig. 6. LM. Two vegetative cells dividing: oblique axis.
Fig. 7. Line drawing. CH=chloroplast; LF=longitudinal flagella; O=oil droplet; P=pyrenoid; SE=sulcus on the epitheca; SH=sulcus on the hypotheca; TF=transverse flagella.