Euglenoids are flagellated unicells (with
the exception of one colonial species), without a cell wall (though
Trachelomonas has a wall-like covering), and possess a
series of proteinaceous strips below the plasmalemma that together
make up a pellicle. Only about one third of the genera are photsynthetic.
Sexual reproductin has not been observed in he group.
Unicellular organisms with two anterior flagella.
Both are associated with an anterior structure, the reservoir,
but only one emerges from the reservoir. At the base of the emergent
flagellum is an eye spot. Cells with chloroplasts with the same
types of pigments as the green algae. Food is not associatedf
with the chloroplast but is found in the cytoplasm in the form
of a polysaccharide called paramylon. Euglena is motile via its
flagellum and also by a contraction of its shape. This second
type of motility is termed "euglenoid motion".