Tentative serial “Cshape” transformation of the T. (Nannomonas) hyperpachymorph into sphaeromorph (unfolding and “C-folding” model). Photo by Marc Desquesnes. In this series, the “S-shape” of the flagellum seems to unfold from the posterior end of the kinetoplast toward the anterior end (slides 1–12), to attain a “C” shape (snapshots 13–17) in which the cytoplasm is leaf-shaped (snapshot 16–17), before refolding again like a spring while the anterior end seems to enfold the posterior (snapshots 18–20) to look like a baby fish (snapshots 21–24) before finishing like an egg (snapshots 25–28).