Family: Test usually more or less compressed; pseudostome narrowly oval or slit-like.
Genus: Test more or less flask-shaped, with more or less neck (Illustrated Guide, 1985).

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Group: Collaroides: Test ovate or elongate
N. collaris 31 samples 130-288 x μm 2003-2008	N. collaris 31 samples 130-288 x μm 2003-2008	N. penardiana ? or N. hippocrepis ? 11 samples 205-236 x 110-125 μm 2005-2007	N. flabellulum 75 x 70 μm L/W= Hakkoda Gourd line Hakkoda mountain Aomori, 2006
Nebela sp. 245 x 198 μm L/W= Komado marsh Showa & Tajima Fukushima, 2007	N. tincta 13 samples 75-164 x μm L/W=1.2-1.4 2003-2008	Nebela sp. ? 4 samples 110 x 85 μm 2003-2008
N. dentistoma 4 samples 90-116 x μm 199?-2005	N. dentistoma 4 samples 90-116 x μm 199?-2005	N. tenella 5 samples 93-108 x μm 2006-2008	N. militaris 3 samples 72-150 x μm Hakkoda mountain Aomori, 2006
Nebela sp. ? 90 x 62 μm L/W=1.5 Kowashimizu Suwa Nagano, 2005	N. vitrea ? 95 x 64 μm L/W=1.5 Iroha-numa 2 Zao mountain Yamagata, 2006
Group: Lagenoides: Test with a long neck
N. americana 10 samples 135-166 x μm L/W=2.2-2.4 2005-2007	N. americana ? 94 x 40 μm L/W= Imou bog 5 Toyohashi Aichi, 2006	N. lageniformis 4 samples 130-150 x μm L/W=1.9,2.1 Aomori, 2005-7	N. barbata 11 samples 90-115 μm L/W=2.3 2006-2008
Nebela sp. 80 x 35 μm L/W=2.3 Hakama marsh Madarao highland Niigata, 2005	Nebela sp. ? 133 x 42 μm L/W=3.2 Kannon-numa Shimogo Fukushima, 2005	Nebela sp. μm L/W= Fujimitashiro Katashina Gunma, 2007
Group: Carinatoides: Test with a lateral ridge
N. carinata or N. marginata ? 36 samples 117-235 x μm L/W=1.3-1.7 2004-2008	N. carinata or N. marginata ? 36 samples 117-235 x μm L/W=1.3-1.7 2004-2008	N. marginata or N. carinata ? 36 samples 117-235 x μm L/W=1.3-1.7 2004-2008	N. marginata or N. carinata ? 36 samples 117-235 x μm L/W=1.3-1.7 2004-2008
Group: Misc.
N. bipes 128 x 140 μm 135 x 135 μm 103 x 127 μm Onnenai Kushiro marsh Hokkaido, 2005	N. bipes 105 x 130 μm 115 x 138 μm Onnenai Kushiro marsh Hokkaido, 2005

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