Eutreptia
''Eutreptia'' is a genus of Euglenozoa belonging to the family Eutreptiaceae (Eutreptiidae). The genus was species description, first described by Maximilian Perty in 1852. It has a cosmopolitan distribution, and is most commonly found in marine or brackish waters; however, some species have also been reported from freshwater. Description ''Eutreptia'' consists of single, free-swimming cells that are spindle-shaped with pronounced euglenoid movement (metaboly). Two heterodynamic flagella are present, both highly active while swimming, with a reddish eyespot apparatus, eyespot near the base. ''Eutreptia'' is photosynthetic with green chloroplasts; there may be numerous discoid or ribbon-shaped chloroplasts, often radiating from central pyrenoids surrounded by grains of paramylon. The chloroplast structure is similar to that of ''Euglena viridis'', but in ''Eutreptia'' what appears to be a stellate chloroplast actually consists complex of ribbon-shaped chloroplasts each with a ter ...
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