Metamonada, left: Retortamonas, center: Hexamita, right: Giardia. 1-single nucleous, 2-ventral feeding groove, 3-two nuclei, 4-two cytostomes, 5-two nuclei, 6-adhesive disk. Reddraw from: Jeffrey D. Silberman, Alastair G. B. Simpson, Jaroslav Kulda, Ivan Cepicka, Vladimir Hampl, Patricia J. Johnson and Andrew J. Roger, Retortamonad Flagellates are Closely Related to Diplomonads—Implications for the History of Mitochondrial Function in Eukaryote Evolution, Molecular Biology and Evolution 19:777-786 (2002).
self-made (with xfig in Linux)
Franciscosp2