Family: Test round, more or less oval (Illustrated Guide, 1985).
Genus: Test elastic, membranous, in a firm cup-shaped outer test (Illustrated Guide, 1985).

->> Description at WPRNO

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F. reniformis μm Japan, 1998	F. reniformis 25 x 17 μm Akebono marsh Tsuchiyu-onsen Fukushima, 2005	F. reniformis μm Tennoh Tessei-cho Okayama, 2005	F. reniformis 20 x 15 μm Yukawa-numa Nishiwaga Iwate, 2007
F. reniformis μm near Omine Mt. Minakami Gunma, 2007	F. reniformis μm near route 272 Minakami Gunma, 2007	F. reniformis μm Kannon-numa 10 Shimogo Fukushima, 2008	F. reniformis μm Kannon-numa 10 Shimogo Fukushima, 2008
F. reniformis μm Iyari marsh Omachi Nagano, 2008

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