| 
C. aspera / C. lanceolata / C. helmckei ? | 
 
	 C. aspera
	 28 samples
	 150-315 μm
	 1997-2006 | 
 
	 C. aspera
	 28 samples
	 150-315 μm
	 1997-2006 | 
 
	 C. lanceolata
	 28 samples
	 150-315 μm
	 1997-2006 | 
 
	 C. lanceolata
	 28 samples
	 150-315 μm
	 1997-2006 | 
| 
Others  | 
 
	 C. proxima ?
	 155 x 40 μm
	 Onnenai
	 Kushiro marsh
	 Hokkaido, 2005 | 
 
	 Cymbella sp.
	 7 samples
	 on stalk
	 75-104 μm
	 2001-2006 | 
 
	 Cymbella sp.
	 88 x 16 μm
	 Aizu Recreation p.
	 Aizuwakamatsu
	 Fukushima, 2005 | 
 
	 Cymbella sp.
	 61 x 8 μm
	 Koigakubo marsh
	 Tessei-cho
	 Okayama, 2004 | 
 
	 C. silesiaca ?
	 3 samples
	 52-53 μm
	 Japan, 2005 | 
 
	 Cymbella sp.
	 4 samples
	 58-85 μm
	 2003-2005 | 
 
	 Cymbella sp.
	 66 x 16 μm
	 Lake Shirakaba
	 Tateshina & Chino
 | 
 
	 Cymbella sp.
	 60 x 18 μm
	 Futayo-no-ike
	 Haguro mountain
	 Yamagata, 2005 | 
 
	 Cymbella sp.
	 43 x 15 μm
	 Lake Shirakaba
	 Tateshina & Chino
	 Nagano, 2005 | 
 
	 C. minuta
	 6 samples
	 20-40 μm
	 2003-2005 | 
 
	 C. naviculiformis ?
	 or C. tumida ?
	 3 samples
	 63-72 μm
	 2003-2005 | 
 
	 C. tumida
	 C. prostrata ?
	 64 x 19 μm
	 Satsunai river
	 Obihiro
	 Hokkaido, 2005 | 
 
	 C. obscura
	 38 x 13 μm
	 Chaya-numa p.
	 Fukushima city
	 Fukushima, 2005 | 
 
	 C. cuspidata ?
	 6 samples
	 51-93 μm
	 2003-2005 | 
 
	 Cymbella sp.
	 C. cuspidata ?
	 67 x 20 μm
	 Lake Shirakaba
	 Tateshina & Chino
	 Nagano, 2005 | 
 
	 C. amphicephala ?
	 2 samples
	 37-39 μm
	 2003-2004 | 
 
	 Cymbella sp. ?
	 116 x 33 μm
	 Senjo-ga-hara
	 Nikko
	 Tochigi, 2003 | 
 
	 Cymbella sp.
	 82 x 25 μm
	 Takao Sakura p.
	 Kitamoto
	 Saitama, 2005 | 
 
	 C. latens ?
	 30 x 15 μm
	 Ikoi-no-mori p.
	 Fuchu
	 Tokyo, 2004 | 
 
	 Cymbella ??
	 24-42 μm 
	 1998-1999 |