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).

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Echinamoeba sp. μm Japan, 1998

Echinamoeba sp. ? μm Kuroiso Tochigi, 2002

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