Genus (Ehrenberg): Body round to polygonal; cingulum median, deep; thecal plates 5-6 in cingulum;
some with apical and antapical horn (Illustrated Guide, 1985).
Epicone (or epitheca) consists of 11-14 thecal plates; hypocone (or hypotheca) of
7-8 thecal plates
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Peridinium volzii ?,
cell body μm long, μm wide,
x 640, Omine-numa (pond/marsh), Tsukiyono town, Gunma Pref., Japan, September 2003 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
