Genus: Clear pseudopods, formed from clear anterior, more or less broad margin (Illustrated Guide, 1985). Group I: Subpseudopodia, digitiform cones. (a: Short conical subpseudopodia) Species: 30-50 μm long; L/B >2; 1-4 pairs of pseudopodia which also occur singly; many tiny crystals; nucleus 3.5 μm (Page, 1976).

50 μm 100 μm 150 μm; x 400

Mayorella (oclawaha ?), locomotive 43 μm long, nucleus 2-3 μm diam., x 400, x 640, by Y. Tsukii

M. penardi: 50-125 (usually > 100) μm; L/B to 4.5; with shallow anterior hyaline edge which bears several mamilliform pseudopodia; may divide into Y shape in changing direction; floating form usually irregularly rounded, very rarely radiate; nucleus 6.5-10 μm (Page, 1976).