Fig. 3

Metoposaurus krasiejowensis ZPAL Ab III/2467, histological sections. A, oblique subtransverse section through the entire specimen (pathological anterior dorsal intercentrum and normal cervical intercentrum); B, coronal section through the dorsal part of the pathological intercentrum; C, D, closeup of the external part of the pathology (larger rectangle in A) showing neoplastic (secondary?) lamellar trabecular bone with large irregular cavities in (C) normal transmitted and (D) polarized light; E, F, close-up of the frontier between normal secondary trabecular and primary periosteal cortical bone, and new trabecular bone with destructive cavities in (E) normal transmitted, (F) polarized, and (G) polarized light with lambda wave plate