Family:
Genus:

Thin at both ends
N. acicularis 92 x 4 μm Nishi-Urawa Saitama, 2003	N. acicularis 78-92 x 3 μm Kuroiso Tochigi, 2001	N. acicularis 88 x 4 μm Hirai river Akiruno Tokyo, 2004	N. acicularis 87 x 4 μm Shinobazu-ike Tokyo, 2001
N. acicularis 86 x 4 μm Jizoh-bori Sannoh Park Saitama, 2005	N. acicularis 59-81 x 3 μm Japan, 1997	N. acicularis 72 x 4 μm Japan, 1999	N. acicularis 71 x 4 μm Omoi river Oyama Tochigi, 2004
N. acicularis 63-69 x 3.5 μm Uruguay, 1999	N. acicularis 52-62 x 4 μm Sendabori Chiba, 2002	N. acicularis 57 x 4 μm Tama river Chofu Tokyo, 2004	N. acicularis 61 x 3.5 μm Usui river Takasaki Gunma, 2004
N. acicularis 55 x 4 μm Karasu river g.l. Fujioka Gunma, 2004	N. acicularis 53 μm Chiba-Minato p. Chiba, 2003	N. acicularis 45-68 x 3 μm Tachikawa Tokyo, 2004	N. acicularis 88 x 4 μm Hirose athletic p. Kumagaya Saitama, 2004
N. acicularis 62 x 3 μm Iruma river Sayama Saitama, 2004	N. acicularis 68 x 3 μm Owada Park Saitama, 2005	N. acicularis 84 x 3 μm Nagaike park Hachioji Saitama, 2005	N. acicularis 57,62 x 4 μm Asa-kawa Hachioji Saitama, 2005
N. acicularis 88 x 3 μm Oura central p. Oura Gunma, 2006	N. acicularis 88 x 3 μm near Sakitama-kofun Gyoda Saitama, 2006	N. acicularis 56 x 3 μm Binnuma-gawa Fujimi Saitama, 2006	N. acicularis 70 x 4 μm Jionji-shinsui p. Iwatsuki Saitama, 2006
Relatively thick at both ends
N. acicularis 62 x 4 μm Japan, 1999	N. acicularis 55 x 5 μm Iruma river Kawagoe Saitama, 2004	N. acicularis 78 x 4 μm Shinobazu-ike Tokyo, 2001

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