Fig. 6 in Low durophagous predation on Toarcian (Early Jurassic) ammonoids in the northwestern Panthalassa shelf basin

Fig. 6. Position of ventral breakage in the shells of seven early Toarcian ammonoid genera. Specimens whose position of the aperture is uncertain are excluded. Arrows indicate the average of the estimated position of last septum. The living orientation of the shells is based on Westermann 1996). A. Dactylioceras. B. Fontanelliceras. C. Fuciniceras. D. Protogrammoceras. E. Paltarpites. F. Harpoceras. G. Cleviceras.