Species [var. digitus]: Cell body 130-300 μm long, 40-84 μm wide, L/W = 3-4; cell wall smooth.
[var. lamellosum]: Longer than v. digitus, both sides parallel; cell body 140-416 μm long, 32-60 μm wide, L/W = 5-8.
[var. naegelii]: Smaller than v. digitus, both ends broadly rounded; cell body 100-200 μm long, 25-36 μm wide, L/W = 4-5.
[var. rectum]: Larger than v. digitus, tapered to both ends; cell body 300 μm long, 48 μm wide, L/W = 6.3 (Illustrations of The Japanese Fresh-water Algae, 1977).

Google Image Search

N. digitus var. naegelii, L/W=4-5
v. naegelii 263 x 63 μm L/W=4.2 U.S.A., 1999	v. naegelii 263 x 63 μm L/W=4.2 Niigata, 2001 Movies	v. naegelii 183 x 44 μm L/W=4.2 Hasu-ike Shiga highland Nagano, 2005	v. naegelii 235 x 55 μm L/W=4.3 Numa-no-hara m. Madarao highland Niigata, 2005
v. naegelii 213 x 50 μm L/W=4.3 Hasuda Saitama, 2002	v. naegelii 300 x 68 μm L/W=4.4 Dojo-ike Norikura highland Nagano, 2006	v. naegelii 300 x 69 μm L/W=4.3 Ushidome-ike Norikura highland Nagano, 2006
v. naegelii 258 x 59 μm L/W=4.4 Yamagata, 1999 Movies	v. naegelii 161 x 37 μm L/W=4.4 Otto-Numa Ibaraki, 2002
v. naegelii 266 x 60 μm L/W=4.4 Seseragi marsh Shiga highland Nagano, 2004	v. naegelii 167 x 37 μm L/W=4.5 Numappara marsh Kuroiso Tochigi, 2003	v. naegelii 175 x 39 μm L/W=4.5 Ibaraki, 2000	v. naegelii 260 x 58 μm 243 x 50 μm L/W=4.5,4.9 Ikenokochi marsh Tsuruga Fukui, 2004
v. naegelii 190,195 x 43 μm L/W=4.4,4.5 near Karakemi m. Omachi Nagano, 2005	v. naegelii 220 x 47 μm L/W=4.7 near Yamaguchi Yamaguchi, 2004	v. naegelii 300 x 62 μm L/W=4.8 near Karakemi m. Omachi Nagano, 2005	v. naegelii 240 x 49 μm L/W=4.9 Kannon-numa Shimogo Fukushima, 2005
v. naegelii 180 x 42 μm L/W=4.3 Onnenai Kushiro marsh Hokkaido, 2005	v. naegelii 145 x μm L/W= Miyatoko m.3 Minami-Aizu Fukushima, 2008	v. naegelii 201 x 49 μm L/W=4.1 Furuike m.1 Iiyama Nagano, 2008
v. naegelii or N. oblongum ? 245 x 60 μm L/W=4.1 Hyoutan-ike Shiga highland Nagano, 2005	v. naegelii or N. oblongum ? 206 x 49 μm L/W=4.2 Mida-ga-hara Gassan Yamagata, 2005	v. naegelii 282 x 56 μm L/W=5.0 Hiroshima, 1998 Movies

Please click on species name for more images.

Copyright Protist Information Server