Family & Genus: With branching, anastomosing pseudopodia, mainly at extermities
(Illustrated Guide, 1985).
When inactive, rounded or ovoid; when active, expanded; 1 or more contractile vacuoles;
fresh water (Kudo, 1966).
Penardia sp. (or Nuclearia ?),
cell body μm long, μm wide, L/W=,
x 640, a small pond at Obihiro University of Agriculture and Veterinary Medicine, Obihiro city, Hokkaido, Japan, October 13, 2005 by Y. Tsukii
94 μm; x 640