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Euglenophyceae: Euglenales
Mastigophora: Euglenida

 Trachelomonas abrupta
Swirenko, 1914

Trachelomonas Species: Lorica cylindrical (var. abrupta 22-30 x 15-19 μm and var. minor 16-20 x 10-12 μm) with semispherical ends, or elongated ellipsoidal (var. arcuata 20-30 x 14-18 μm); collar absent; surface granulated or dotted (many small and short spines) (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000)
Similar species -->> T. lacustris (elongated cylindrical, dotted); T. hispida (ellipsoidal, spiny); T. allia (broad cylindrical, spiny); T. klebsii (cylindrical, spiny);

Trachelomonas abrupta var. abrupta, lorica 27 μm long, 17 μm wide, L/W=1.6, x 640, Onnenai, Kushiro marsh, Kushiro city, Hokkaido, Japan, October 16, 2005 by Y. Tsukii
scale 50 μm scale 31 μm scale 63 μm scale 94 μm; x 640
Trachelomonas Trachelomonas

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