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Historical bone structure of lower cretaceous dinosaurs from southwest Istria (Croatia)

Recently discovered dinosaur bones in submerged near-shore deposits of southwest Istria one vertebra, one femur, and two rib fragments. They all show well-developed vascularization. The large amounts of primary bone tissue in the vertebral and femoral compacta as well as in one rib fragment suggest that they belong to sub-adult animals which were growing rapidly. The structure of a second rib fragment differs in that it consists of secondary bone. The absence of lines of arrested growth is evident in all investigated bones. This suggests a sustained manner of bone deposition.

upper hauterivian; lower barremian; dinosaur bones; palaeofauna; palaeohistology; Croatia

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