Fig. 9. A in Triassic coleoid beaks and other structures from the Calcareous Alps revisited

Fig. 9. A fracture of the hypothesized "beak" of the coleoid cephalopod Phragmoteuthis bisinuata (Bronn, 1859) (GBW 2006/011/0009); lower Carnian, Upper Triassic, Cave del Predil, NE Italy. A1, "nano-porosity" of the matrix of the hypothesized "beak"; A2, A3, bone-like structures (light grey) in the matrix (dark grey) (enlargements of Fig. 8A1, A2); A4, enlarged detail of Fig. 8A3 to show a smooth surface of dense bone-like structure.