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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. klebsii ?), lorica 27 μm long, 17 μm wide, x 640, Mitsumata-numa biotope, at the border of Kawagoe city, Kawajima town and Ageo city, Saitama Pref., Japan, March 21, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Trachelomonas Trachelomonas Trachelomonas Trachelomonas Trachelomonas

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