Undulipodium: End of a useless discussion

The term "undulipodium" was created by Otto Bütschli at the beginning of this century. The literal translation from Latin/Greek to English means: swinging foot. The term was later used not only to overcome the minor differences between cilia and flagella which were thought to be trivial but primarily to argue (i) for the homology of flagella (of flagellates) and pseudopodia (of rhizopods) or (ii) the homology of all flagellar structures detectable in eukaryotic and prokaryotic organisms. The current use and traditional use are not the same and the continued use of the term is not supported.