Family: Oval to flattened, or elongated; thin to spiny pseudopodia; endocysts not polygonal; lack opercula
(Illustrated Guide, 1985).
Genus: Pseudopods short, spiny, formed from hyaline anterior zones (Illustrated Guide, 1985).
Echinamoeba sp. ?,
cell body μm long, μm wide,
x 640, Near Aoki residence, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, September 2002 by Y. Tsukii
94 μm; x 640