portrait
Eutreptiella (you-trep-tea-ella), a marine euglenid. The autotrophic euglenids (the ones with chloroplasts) are usually thought of as being freshwater organisms. A small number of species are found in marine habitats - the most commonly reported being Eutreptia (flagella equal in length) and Eutreptiella (flagella unequal in length) . Both have two or more emergent flagella, and these beat actively to propel the cell through the water. Euglenids have chlorophyll b in the plastids, and this gives them a bright green colour. The eyespot (stigma) lies outside the plastids. Euglenids are distinguished, in part, by the ridges under the cell membrane. Differential interference contrast. This picture was taken by David Patterson, Linda Amaral Zettler and Virginia Edgcomb of materials from sediments of the marine site, Eel Pond in Austumn 2000, spring and summer 2001. Image copyright: D. J. Patterson, L. Amaral-Zettler and V. Edgcomb, image used under license to MBL (micro*scope).
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Eutreptiella
From the collection
Eel Pond, Woods Hole, Massachusetts
| Description of Eutreptiella: Eutreptiid euglenids, with 2 flagella of unequal length, marine, type species: E. marina da Cunha 1913. |
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