title: Motile flagellum with a "3 + 0" ultrastructure.
abstract: The male gamete of the parasitic protozoan Diplauxis hatti has a flagellum consisting of three doublet microtubules. This flagellum exhibits a helicoidal waveform in which bends propagate toward the tip with a frequency of about 1.5 hertz. It is the simplest motile eukaryotic flagellum yet described.
mesh_terms: D000818:Animals; D056890:Eukaryota / Q000648:ultrastructure*; D005407:Flagella / Q000502:physiology* / Q000648:ultrastructure; D008297:Male; D008870:Microtubules / Q000648:ultrastructure; D009038:Motion; D013094:Spermatozoa / Q000648:ultrastructure