The Euglena Viridis is always performing mitosis and cytokenisis. They begin as free-swimming flagellates, but when they become palema, they lose their flagella and begin reproducing until their flagella grow back.
Harris, J., M. A. Kector, and F. R. S. "Some Microscopical Observations of Vast Numbers of Animalcula Seen in Water by John Harris, M. A. Kector of Winchelsea in Sussex, and F. R. S." Philosophical Transactions of the Royal Society of London 19.215-235 (1695): 254-59. Some Microscopical Observations of Vast Numbers of Animalcula Seen in Water by John Harris, M. A. Kector of Winchelsea in Sussex, and F. R. S. (January 1, 1753). Internet Archive. Web. 22 Mar. 2014.
Keeling, Patrick J. "Chromalveolates and the Evolution of Plastids by Secondary Endosymbiosis." Journal of Eukaryotic Microbiology 56.1 (2009): 1-8. Web. 13 Mar. 2014.
Margulis, Lynn, and Dorion Sagan. "Power to the Protoctists." Dazzle Gradually: Reflections on the Nature of Nature. White River Junction, VT: Chelsea Green Pub., 2007. N. pag. Dazzle Gradually: Reflections on the Nature of Nature. Google Inc. Web. 13 Mar. 2014.
Rodríguez-Ezpeleta, Naiara, Hennor Brinkmann, Gertraud Burger, Andrew J. Roger, Michael W. Gray, Hervé Phillipe, and B. F. Lang. "Toward Resolving the Eukaryotic Tree: The Phylogenetic Positions of Jakobids and Cercozoans." Current Biology - Toward Resolving the Eukaryotic Tree: The Phylogenetic Positions of Jakobids and Cercozoans. Current Biology, 21 Aug. 2007. Web. 12 Mar. 2014.
Simpson, A. G. B. "Cytoskeletal Organization, Phylogenetic Affinities and Systematics in the Contentious Taxon Excavata (Eukaryota)." International Journal Of Systematic And Evolutionary Microbiology 53.6 (2003): 1759-777. Cytoskeletal Organization, Phylogenetic Affinities and Systematics in the Contentious Taxon Excavata (Eukaryota). International Journal of Systematic and Evolutionary Microbiology. Web. 12 Mar. 2014.