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Fig. 5 | Swiss Journal of Palaeontology

Fig. 5

From: 3-D orientation and distribution of ammonites in a concretion from the Upper Cretaceous Pierre Shale of Montana

Fig. 5

Cephalopods in the concretion. a Hoploscaphites crassus, macroconch, oblique left lateral view, AMNH 85455, with shell damage on the adoral part of the body chamber (arrow). b, c Baculites baculus, juveniles, lateral view. b AMNH 64470. c AMNH 64442. d H. plenus, macroconch, oblique left lateral view, AMNH 85444, with large hole in the adapical part of the body chamber (arrow). e SEM of the microstructure of a sample of the outer shell of H. crassus, AMNH 85473, with PI = 3.5. f Small, broken phragmocone attributed to H. crassus or H. plenus, right lateral view, AMNH 64484. g, h H. plenus, microconch, AMNH 63598. g Right lateral view. h Ventral view. i Gladius of an unidentified coleoid, AMNH 63599. j H. crassus, macroconch, ventral view, AMNH 85450, with large piece of shell missing from the venter of the body chamber (arrow). k H. plenus, macroconch, right lateral view, AMNH 85473, with large chunk of shell missing from the venter of the body chamber (arrow). ln H. saltgrassensis, microconch, AMNH 64456. l Right lateral view. m Apertural view. n Ventral view

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