Euglena

Euglena
Scientific classification
Domain:	Eukarya
Kingdom:	Protista
Phylum:	Euglenozoa
Class:	Euglenoidea
Family:	Euglenaceae
Genus:	Euglena; Ehrenberg, 1830

Euglena is a large genus of unicellular protists: they have both plant and animal characteristics.

All live in water, and move by means of a flagellum. This is an animal characteristic. Most have chloroplasts, which are characteristic of algae and plants.

Euglenids are believed to descend from an ancestor that took up green algae by secondary endosymbiosis.^[1]

Over 1,000 species of Euglena have been described, and there are more to be discovered. Their relationships are being analysed.^[2]

↑ Keeling PJ (2009). "Chromalveolates and the evolution of plastids by secondary endosymbiosis". J. Eukaryot. Microbiol. 56 (1): 1–8. doi:10.1111/j.1550-7408.2008.00371.x. PMID 19335769. S2CID 34259721.
↑ Montegut-Felkner, Ann E. & Triemer, Richard E. 1997. Phylogenetic relationships of selected Euglenoid genera based on morphological and molecular data". Journal of Phycology. 33 (3): 512–9. [1]

[pmid19335769-1] Keeling PJ (2009). "Chromalveolates and the evolution of plastids by secondary endosymbiosis". J. Eukaryot. Microbiol. 56 (1): 1–8. doi:10.1111/j.1550-7408.2008.00371.x. PMID 19335769. S2CID 34259721.

[2] Montegut-Felkner, Ann E. & Triemer, Richard E. 1997. Phylogenetic relationships of selected Euglenoid genera based on morphological and molecular data". Journal of Phycology. 33 (3): 512–9. [1]

[1]

[2]