Family: Usually polypodial, pseudopods granular, cylindroid.
Genus (Linnaeus, 1858), emend King & Jahn, 1948: Pseudopods ridged;
multinucleate (Illustrated Guide, 1985).
Species: Polypodal, 1000-2000 μm;
monopodal, 1000-5000 μm long;
pseudopods, cylindroid, ridged, clear caps; uroid, morulate; ectoplasm clear, distinct;
endoplasm granular; nuclei, multinucleate, 1000 or more, each a circular or ellipsoid disc,
18-30 μm diam.,
11-12 μm thick; cysts rare, round, 300-600
μm; division by plasmotomy;
synchronous mitosis of nuclei; Paramedium caudatum adequate food
(Illustrated Guide, 1985).