Figure 5

Figure 5 — Ammonoid morphospace after Tendler et al. (2015) using the Raupian parameters W, S and D (Raup 1966). W, rate of size increase of the generating curve per whorl; D, distance between the generating curve and the coiling axis; S, shape of the generating curve, equivalent to the cross-sectional shape of the tube (modified after Klug et al. 2016).

Figure 5 — Ammonoid morphospace after Tendler et al. (2015) using the Raupian parameters W, S and D (Raup 1966). W, rate of size increase of the generating curve per whorl; D, distance between the generating curve and the coiling axis; S, shape of the generating curve, equivalent to the cross-sectional shape of the tube (modified after Klug et al. 2016).