Abstract
Abstract. BONE HISTOLOGY OF THE TITANOSAUR BONITASAURA SALGADOI (DINOSAURIA: SAUROPODA) FROM THE UPPER CRETACEOUS OF PATAGONIA. The bone histology analysis of the titanosaur Bonitasaura salgadoi, from Rio Negro Province, Argentina, was analysed in detail. It represents the first complete histological characterization of a South American sauropod based on a single specimen. Multiple samples were taken from different parts of the skeleton according to available fragmentary elements as well as to their paleohistological importance. The femur and humerus are characterized by a wide cortex mainly composed of primary, highly vascularized fibrolamellar tissue, interrupted by at least one growth mark. None of the samples show external avascular lamellar tissue (EFS). Samples from the ulna, one metacarpal and a caudal vertebral zygapophysis show histological similarities, allowing recognition of great internal remodeling with several generations of secondary tissue. Although very reduced, the primary fibrolamellar...
Published Version
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