Family: Body more or less triangular to spatulate; tapered, round-tipped pseudopods.
Genus: Clear pseudopods, formed from clear anterior, more or less broad margin (Illustrated Guide, 1985).
(Test with short neck, round in cross-section; pseudostome oval or polygonal)

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Group II: Subpseudopodia, broadly based mammilliform or nearly hemisperical pyramids
II-c1: Pseudopods broad, cell body flat ellipsoidal; locomotive more than 100 μm
Mayorella sp. 180, 20, 12 μm cytoplasm vacuolated fuzzy surface Higashi-hiroshima Hiroshima, 1998	Mayorella sp. 148, 16 & 5 μm cytoplasm vacuolated composite nucleus Higashi-hiroshima Hiroshima, 1998	Mayorella sp. 128, 14, 8 μm near Akai wetland Aizuwakamatsu Fukushima, 2005	Mayorella sp. 125, 10, 7 μm cytoplasm vacuolated Akigase park Saitama, 1998
Mayorella sp. 140 μm Kareki-numa Nikko Tochigi, 2008	Mayorella sp. 130 x 50 μm Yamaguchi Univ. Yamaguchi Yamaguchi, 2004	Mayorella sp. 96, 7, 5 μm Japan, 199?	Mayorella sp. μm Kahan Park Kuroiso Tochigi, 2003
II-c2: Pseudopods broad, cell body spatulate; locomotive less than 100 μm
Mayorella sp. 50-75, 5, 3 μm Japan, 1998	Mayorella sp. 52 μm Koraku-en Okayama, 2002	Mayorella sp. μm Shinagawa Tokyo, 2003	Mayorella sp. 48 x 30, 5, 2.5 μm Japan, 199?
Mayorella sp. 51-55, 7, 4-5 μm pseudopod rounded Japan, 1999	Mayorella sp. 55 x 20, -, - μm Watarase Wetland Fujioka Tochigi, 2005

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