Genus: Usually limax-like, with villous-bulb uroid; locomotion by steady flow with occasional
slight antero-lateral bulging; floating form with long, blunt, granular pseudopodia; uninucleate (Page, 1976).
Pseudopods do not meld at bases during locomotion; pseudopods not ridged; nucleus spherical
(Illustrated Guide, 1985).
Species: Polypodal, 180-250 μm long; monopodal, 250-300 μm long. Uroid, semipermanent, with fine filaments. Ectoplasm, viscous, clear, thin. Endoplasm, grayish, granular; nucleus, round in flat view, 30-45 μm diam., contractile vacuole 40-60 μm (Illustrated Guide, 1985). L/B often 3 (?) (Page, 1976).