Euglenophyceae: Euglenales
Mastigophora: Euglenida

Euglena variabilis

Identified by Chi Ling Wang at Dept. of Nature Science Education, National Chia-Yi Teacher's College, Taiwan

Species: Cells 31-39 μm long, 9-13 μm broad; strongly metabolic; fusiform or most frequently asymmetrically gourd-shaped, anterior end broadly rounded, undulated at middle portion of the cells and attenuated into a short blunt non-hyaline cauda; pellicle delicately spirally striated, 20-24 striae per 10 μm; chloroplast numerous, disk-shaped, parietal, 2~3m in diameter, without pyrenoids; paramylon grains dimorphic: one bigger rod-shaped (4-5 ~ 2-3 μm), located near the eyespot, numerous small granulate ones scatter in the cytoplasm; nucleus spherical, 5-7 μm in diameter, enclosed by some small paramylon grains, located dorsally at posterior portions of the cells; eyespot very prominent, curved lamellar-shaped, with convex face outward, 4-5 μm in length; locomotory flagellum body length.
->> Species Descriptions

Euglena variabilis, cell with numerous discoid chloroplasts, many small paramylons scatter in cytoplasm, the larger one locate at the neighborhood of eyespot; swimming fast; cell shape somewhat like a gourd (39x12um), x 1000, by Chi Ling Wang
50 um 100 um 150 um; x 400 : 20 um 40 um 60 um; x 1000

Please select images for viewing enlarged.
Copyright 1995-2008 Protist Information Server