image_list image_listE

Euglenophyceae: Euglenales
Euglenida:

Astasia longa
Pringsheim, 1936

Astasia Genus: Only 1 flagellum emergent from canal, colourless; eyespot absent; cell body fusiform or elongated, plastic, with pronounced euglenoid movement; many species, mostly freshwater (Illustrated Guide, 1985).
Species: Cell body spindle in shape, posterior end slightly pointed, 55-60 μm long, 8 μm wide (fixed sample); a locomotive flagellum 1/3 0 1/2 of the cell body in length; paramylon bodies bar-shaped or ellipsoidal, small (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).

Astasia sp., stock 38A, flattened, axenic culture, cell body 47 μm long, 18 μm wide, anterior flagellum 40 μm long, a nucleus spherical, 7 μm in diam., x 400, x 640, Uruguay, 1999, collected by Takahashi et al., isolation and photo by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640

Astasia longa Pringsheim, 1936: Cell body spindle in shape, posterior end slightly pointed, 55-60 μm long, 8 μm wide (fixed sample); a locomotive flagellum 1/3 0 1/2 of the cell body in length; paramylon bodies bar-shaped or ellipsoidal, small (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000). Cell body 70-96 μm long, 10-14 μm wide, two large paramylon bodies ring-shaped (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000). Outline shape similar to that of Euglena gracilis (How to know the protozoa, 1979).

Astasia lagenula Schewiakoff: Cell body cylindroid with posterior end rounded, 45 μm long, 10 μm wide; a flagellum more or less longer than the body length; ovoidal paramylum granules (WPRNO).

Astasia klebsi :

Astasia dangeardi : Outline shape similar to that of Euglena rostrata (How to know the protozoa, 1979).

Astasia captiva :

Please click on images for viewing enlarged.
Copyright Protist Information Server