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. lamellosum, L/W=5-8
N. digitus v. lamellosum 330 x 60 μm 350 x 62 μm L/W=5.5,5.6 near Akai wetland Aizuwakamatsu Fukushima, 2005	N. digitus v. lamellosum 275 x 53 μm L/W=5.2 Kodanuki marsh Fujinomiya Shizuoka, 2005	N. digitus v. lamellosum 254 x 49 μm L/W=5.2 Kodanuki marsh Fujinomiya Shizuoka, 2006	N. digitus v. lamellosum 218 x 42 μm L/W=5.2 Higashi-sano Hakuba Nagano, 2004
N. digitus v. lamellosum 231 x 40 μm L/W=5.8 Fujimi Saitama, 1999 Movies	N. digitus v. lamellosum 219 x 40 μm L/W=5.4 Tochigi, 2000	N. digitus v. lamellosum 163 x 32 μm L/W=5.1 Omine-numa Tsukiyono Gunma, 2003	N. digitus v. lamellosum 216 x 33 μm L/W=6.5 Omine-numa Tsukiyono Gunma, 2007
N. digitus v. lamellosum μm L/W= n. Oyomi marsh Hakuba Nagano, 2008	N. digitus v. lamellosum μm L/W= n. Yamakado marsh Nishi-Azai Shiga, 2008	N. digitus v. lamellosum 340 x 57 μm L/W=6.0 Kareki-numa Nikko Tochigi, 2008	N. digitus v. lamellosum ? 155 x 34 μm L/W=4.6 Tashirodaira m.6 Hakkoda mt. Aomori, 2006

Please click on species name for more images.

Copyright Protist Information Server