Subgenus: Entomum (Apical area deeply indented or notched)
Section: Incisa (Cell surface smooth; apical area without spiny projections)
Species: Cell body 60-74 μm long, 34-46 μm wide, isthmus 8-15 μm wide, (Illustrations of the Fresh-water Algae, 1977).
Google Image Search
| var. sinuosum: 60-74 μm long, 34-46 μm wide | |||
v. sinuosum 66 x 44 μm Vermont-Maine USA, 1999 |
v. sinuosum 67 x 43 μm Mida-ga-hara 4 Gassan (mt.) Yamagata, 2006  |
v. sinuosum ? 55 x 35 μm Mida-ga-hara 7 Gassan (mt.) Yamagata, 2006 |
v. sinuosum μm Senjo-ga-hara Nikko Tochigi, 2003 |
v. sinuosum 78 x 50 μm Sensho-ga-hara 8 Shizukuishi Iwate, 2007 |
v. sinuosum ? x 56 μm Iroha-numa Azuma mt. Yamagata, 2007 |
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| Similar var. - >
v. aboense; v. gangense; v. subjenneri; v. perforatum; v. reductum; v. scrobiculatum; |
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| var. gangense: Single pore present at the center of semicell; 46-66 &*#956;m long | |||
v. gangense ? 53 μm Sensho-ga-hara 1 Shizukuishi Iwate, 2007 |
v. gangense 56 μm near Hachimantai mt. Hachimantai Iwate, 2007 |
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| var. scrobiculatum: | |||
v. scrobiculatum ? 86 x 50 μm Sukawa highland Kurikoma mountain Akita, 2005 |
v. scrobiculatum ? 73 x 40 μm Hachiman-numa m2 Hachimantai Iwate, 2007 |
v. scrobiculatum ? 70 x 42 μm Mitsuishi m.2 Hachimantai Iwate, 2008 |
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| var. germanicum: 59-78 μm long, 36.5-47.6 μm wide | |||
v. germanicum 67 x 37 μm Tashirodaira m. Hakkoda mountain Aomori, 2005 |
v. germanicum 71-73 x μm Tashirodaira m. Hakkoda mountain Aomori, 2006 |
v. germanicum 73 x 35 μm Yukawa-numa Nishiwaga Iwate, 2007 |
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v. germanicum 72 x 39 μm Iroha-numa 2 Zao mountain Yamagata, 2006 |
v. germanicum 71 x 38 μm Iroha-numa 1 Zao mountain Yamagata, 2006 |
v. germanicum μm Iroha-numa 1 Zao mountain Yamagata, 2008 |
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v. germanicum 74 x 42 μm Komado marsh Showa and Tajima Fukushima, 2004 |
v. germanicum 73 x 45 μm Komado marsh Showa and Tajima Fukushima, 2004 |
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v. germanicum μm Miyatoko m.5 Minami-Aizu Fukushima, 2008 |
v. germanicum 76, 64 μm Numappara marsh Kuroiso Tochigi, 2003 |
v. germanicum 57, 49 μm Numappara marsh Kuroiso Tochigi, 2003 |
v. germanicum 66, 70 μm Numappara marsh Nasu-shiobara Tochigi, 2007 |
v. germanicum 71 x μm Kareki-numa Nikko Tochigi, 2008.8 |
v. germanicum 80 x μm Kareki-numa Nikko Tochigi, 2008.9 |
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v. germanicum 59 μm Omine-numa Tsukiyono Gunma, 2003 |
v. germanicum 58 x μm Omine-numa Tsukiyono Gunma, 2003 |
v. germanicum 61,65 x μm Omine-numa Minakami Gunma, 2007 |
v. germanicum 65.5 x 35 μm Oze-ga-hara Katashina Gunma, 2006 |
v. germanicum ? 53-59 x μm Kodanuki marsh Fujinomiya Shizuoka, 2006 |
v. germanicum ? 53 x 33 μm Imou bog Toyohashi Aichi, 2004 |
v. germanicum ? 50 x 32 μm Midagahara Tate-yama Toyama, 2006 |
v. germanicum 73 x 41 μm Koigakubo marsh Tessei-cho Okayama, 2004 |
v. germanicum 78 x 46 μm Kashibaru m.4 Karatsu Saga, 2008 |
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| var. parallelum: 57-62 μm long, 30-31 μm wide | |||
v. parallelum ? 53 μm Omine-numa Tsukiyono Gunma, 2003 |
v. parallelum ? μm Kashibaru m.II Karatsu Saga, 2008 |
v. parallelum ? 62 x 30 μm Mitsuishi m.2 Hachimantai Iwate, 2008 |
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v. parallelum ? 53 μm Mizunashi-Yachi Komado marsh Fukushima, 2007 |
v. parallelum ? 51 μm Kareki-numa Nikko Tochigi, 2008 |
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| var. dideltoides: | |||
v. dideltoides 85 x 48 μm Kejo-numa Furukawa Miyagi, 2003 |
v. dideltoides 107 x 48 μm Iyari marsh 1 Omachi Nagano, 2007 |
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| var. securiformiceps: | |||
v. securiformiceps 62 x 30 μm Ichinose-enchi Norikura highland Nagano, 2006 |
v. securiformiceps 65 x 30 μm Omine-numa Minakami Gunma, 2006 |
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| var. reductum: | |||
v. reductum 66 x 42 μm Mitsuishi m. Hachimantai Iwate, 2008 |
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