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:
->> Description at WPRNO Google Image Search
P. elpatiewskyi ?
35 x 31 μm
Japan, 199?
P. elpatiewskyi ?
27 x 23 μm
Kurobane
Tochigi, 2001
