Origin of euglenaModern Latin from eu- + Classical Greek gl?n?, pupil of the eye from Indo-European base an unverified form ?el-, an unverified form ?l?-, to gleam from source clean
any of a genus (Euglena) of green protists with a single flagellum, a reddish eyespot, and a flexible body shape
Any of various single-celled freshwater organisms of the genus Euglena, characterized by the presence of chlorophyll, a reddish eyespot, a single long anterior flagellum, and a second, rudimentary flagellum.
Origin of euglenaNew Latin Euglēna Greek eu- eu- Greek glēnē eyeball
Any of various unicellular protist organisms of the genus Euglena that live in fresh water, have a cylindrical or sausage-like shape, and move by means of a flagellum. Euglenas contain chloroplasts and can produce their own food by photosynthesis. They can also absorb nutrients directly into the cell from the environment. Euglenas have no rigid covering or cell wall, such as the cellulose cell walls of green algae or plants, over the membrane enclosing the plasma of their cells. They also have a reddish, light-sensitive eyespot which helps them navigate in relation to light sources. In warm weather, euglenas multiply rapidly and form scum on the surfaces of bodies of water.
- B, Anterior end of Euglena showing the flagellum with its swelling just in the hollow of the eye-spot.
- Before leaving the Chlorophyceae, it should be mentioned that the genus Volvox has been included by some zoologists (Btitschli, for example) among Flagellata; on the other hand, certain green Flagellata, such as Euglena, are included by some botanists (for example, van Tieghem) among unicellular plants.
- Similarly, while Diatomaceae may be excluded from among Phaeophyceae, though retained among algae, the Cryptomonadaceae and Peridiniaceae, like Euglena and other Chlorophyceae, may be excluded from Thallophyta and ranged among the flagellate Protozoa.
- 6.A, Eye-spots of Euglena viridis.