Fig. 1From: Speculations on the ethology of some heteromorph ammonitesVariation in the morphology of the shell in turricone (Wright et al. 1996): a Proturrilitoides astierianum (Orbigny); b Turrilites costatus Orbigny; c Hypoturrilites gravesianus (Orbigny); d Ostlingoceras puzosianum (Orbigny); e Turrilitoides densicostatus PassendorferBack to article page