Figure 7. Elemental composition of collagen fibrils-like, bone matrix, blood vessel-like microstructures from Messel Pit turtles, under Phenom ProX-SEM-EDS.

(A) collagen fibrils-like microstructures of Allaeochelys crassesculpta, on the right column, the spectrum obtained from the elemental X-ray spectroscopy analysis indicating the spot in the collagen fibril-like microstructures where the reading was obtained. (B) bone matrix remain of Allaeochelys crassesculpta, with the respective elemental composition spectrum on the right. (C) blood vessel-like microstructure of Neochelys franzeni, with the respective elemental composition spectrum on the right.