Fig. 2. LM. Narrow cingulum with 2 well-developed lists, anterior and posterior, oriented anteriorly, supported by many ribs. C=cingulum; ACL=anterior cingular list; PCL=posterior cingular list.
Fig. 3. LM. Chloroplasts visible (arrows).
Fig. 4. LM. Paired cells. Hypothecal projection on dorsal margin sometimes with a narrow list (arrow) connecting two daughter cells during cell division.
Fig. 5. Line drawing. Right sulcal list depicted. RSL=right sulcal list.