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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 Swirenko var. abrupta (or T. lacustris ?), lorica 26 μm long, 15 μm wide, x 640, Shiba river, near Owada Park, Saitama city, Saitama Pref., Japan, April 3, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Trachelomonas Trachelomonas Trachelomonas
Lorica 26 μm long, 14.5 μm wide, x 640
Trachelomonas Trachelomonas Trachelomonas
Lorica 26 μm long, 14.5 μm wide, x 640
Trachelomonas Trachelomonas Trachelomonas Trachelomonas

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