A New Branch of Life?

Researchers investigate a microorganism that may warrant a new eukaryotic kingdom in the classification of life.

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FLICKR, CASEY FLESER

It’s not a plant. It’s not an animal or fungus. Collodictyon is an algae-eating protozoan found in the sludge of a Norwegian lake. And, sequencing bits of its genome, including its ribosomal DNA, Kamran Shalchian-Tabrizi of the Microbial Evolution Research Group (MERG) at the University of Oslo and colleagues discovered that it’s not like anything else on earth, falling on the tree of life somewhere between single-celled parasites called excavates and amoebas. The organism could thus represent a new kingdom of life, the authors suggested.

“The early and distinct origin of Collodictyon suggests that it constitutes a new lineage in the global eukaryote phylogeny,” the authors wrote in in the journal Molecular Biology Evolution.

Among its obscurities, Collodictyon has four flagella, as opposed to the ...

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Meet the Author

  • Jef Akst

    Jef Akst was managing editor of The Scientist, where she started as an intern in 2009 after receiving a master’s degree from Indiana University in April 2009 studying the mating behavior of seahorses.
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