Family: Small, spherical or pyriform trophonts; tentacles apical or evenly distributed (Illustrated Guide, 1985).
Genus: No stalk (Illustrated Guide, 1985).

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Sphaerophrya sp.1 cell 25 x 25 μm cell 19 x 21 μm Fujimi Saitama, 1999	Sphaerophrya sp.1 cell 23 x 30 μm Japan, 1999	Sphaerophrya sp.1 cell 21 x 32 μm Sannoh park Nishi-ku Saitama, 2004	Sphaerophrya sp.1 cell μm Ushidome-ike Norikura highland Nagano, 2007
Sphaerophrya sp.1 cell 29 x 29 μm Kurihashi Saitama, 2001	Sphaerophrya sp. pray: Uroleptus cell 15-20 μm Fukasaku-gawa Yusuichi Saitama, 2002	Sphaerophrya sp.2 cell 18 x 18 μm Japan, 1998	Sphaerophrya sp.2 cell μm Matsumoto Nagano, 2001
Sphaerophrya sp. cell μm Tone river Tsukiyono Gunma, 2003	Sphaerophrya sp. cell 14 μm φ t. 18 μm Senjo-ga-hara Nikko Tochigi, 2003	Sphaerophrya sp. cell μm φ near Asou bridge Yachiyo Chiba, 2008

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