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).

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Group II: Subpseudopodia, broadly based mammilliform or nearly hemisperical pyramids
II-b1: Pseudopods triangular; cell body more or less flat; locomotive more than 100 μm
M. hohuensis 150-175, 10, 6 μm vesicular nucleus Japan, 199?	M. hohuensis 100, 11, - μm vesicular nucleus Ara-kawa Kumagaya Saitama, 2004	M. hohuensis ? μm pseudopod short trian. Japan, 199?	Mayorella sp. 110, 35, - μm near Shinwa primary sch. Iwatsuki Saitama, 2005
Mayorella sp. 140, 14, 10 μm vesicular nucleus Japan, 199?	Mayorella sp. μm Konpira bridge Shirakawa Fukushima, 2003
M. viridis μm with Chlorella Uruguay, 1999 Movies	M. viridis ? μm Kuroiso Tochigi, 2002	M. viridis ? μm Senjo-ga-hara Nikko Tochigi, 2003	M. viridis μm Omotsubo marsh Tetta-cho Okayama, 2004
M. viridis 120 x 60 μm Iroha-numa 4 Zao mountain Yamagata, 2006	M. viridis μm Kashibaru marsh Karatsu Saga, 2008	M. viridis μm Kannon-numa Shimogo Fukushima, 2008
Mayorella sp. μm Konpira bridge Shirakawa Fukushima, 2003	Mayorella sp. μm Konpira bridge Shirakawa Fukushima, 2002	Mayorella sp. 131 μm Shirakawa Fukushima, 2002	Mayorella sp. 76-104, 8, 6.4 μm pseudopod triangular Japan, 199?
Mayorella sp. 104-112, 11, 7 μm vesicular nucleus* Japan, 199?	Mayorella sp. 75, 10.5, 6.5 μm vesicular nucleus Japan, 199?	Mayorella sp. 74 μm pseudopod triangular Japan, 2000	Mayorella sp. μm dog-eat-dog Uruguay, 1999
Mayorella sp. 138, 12, 7 μm vesicular nucleus cytoplasm vacuolated Japan, 1998	M. inquisita ??, ? μm Japan, 199?	Mayorella sp. 163, 15, 8 μm vesicular nucleus Asaka Saitama, 1999	Mayorella sp. ? μm vesicular nucleus Kuroiso Tochigi, 2002
II-b2: Pseudopods triangular; locomotive less than 100 μm
M. penardi ? 90 μm Numa-no-hara m. Madarao highland Niigata, 2005	M. penardi ? 80 μm near Karakemi m. Omachi Nagano, 2005	M. penardi ? 62-70, 7, 4 μm Japan, 1998	M. penardi 75-94, ?, ? μm Japan, 199?
M. penardi 63-69, 5 μm compact nucleus Japan, 199?	M. penardi Uruguay, 1999	M. penardi stock Tok-1 cysts Otawara Tochigi, 2000	Mayorella sp. 100, 7, 4 μm vesicular nucleus Japan, 199?
Mayorella sp. 70-78, 5-6, 3 μm vesicular nucleus Japan, 1998-99	Mayorella sp. 62 μm, x 640 vesicular nucleus Tokyo, 2001	Mayorella sp. 40-64, 6, 3 μm vesicular nucleus Japan, 199?	Mayorella sp. μm nucleus large Kurihashi Saitama, 2001
Mayorella sp. μm Senjo-ga-hara Nikko Tochigi, 2003

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