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Name derivation:

True little changer -- True Eu- little changer treptiella


Free swimming unicell, green (numerous chloroplasts), with two emergent flagella unequal in length (different from Eutreptia). An eyespot is present.

Similar genera:

Eutreptia has two flagella of equal length.


Typically found in brackish and marine environment, where it sometimes forms blooms.



Graham, L. and Wilcox, L. 2000. Algae. Prentice-Hall

Jaeger, E. C. 1944. A source-book of biological names and terms. Charles C. Thomas, publisher

Leedale G. F. 1967. Euglenoid flagellates. Prentice-Hall