Thomas Cavalier-Smith
![](https://upload.wikimedia.org/wikipedia/commons/6/65/Thomas_Cavalier-Smith_drawing.png)
His research has led to discovery of a number of unicellular organisms (protists) and advocated for a variety of major taxonomic groups, such as the Chromista, Chromalveolata, Opisthokonta, Rhizaria, and Excavata. He was known for his systems of classification of all organisms. Provided by Wikipedia
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Published: 2006
Superior document: Philosophical transactions of the Royal Society of London / Series B, Biological sciences 361(2006)=Nr. 1470