Figure 3

Figure 3 — Evolution of coiled ammonoid shells from straight shells and the consequences for body-chamber length, aperture orientation, thrust angle of the jet they use to move, hydrodynamic stability and interpretations for swimming capabilities throughout evolution; rightmost column shows the evolution of aperture orientation. (Modified after Klug and Korn 2004). BCL, body chamber length; OA, orientation of the aperture; DCL, decoupled chamber liquid.

Figure 3 — Evolution of coiled ammonoid shells from straight shells and the consequences for body-chamber length, aperture orientation, thrust angle of the jet they use to move, hydrodynamic stability and interpretations for swimming capabilities throughout evolution; rightmost column shows the evolution of aperture orientation. (Modified after Klug and Korn 2004). BCL, body chamber length; OA, orientation of the aperture; DCL, decoupled chamber liquid.