Fig. 8From: Elongatoolithid eggs containing oviraptorid (Theropoda, Oviraptorosauria) embryos from the Upper Cretaceous of Southern ChinaHistological sections of the embryonic skeletons. a1, cross section of the tibia of IVPP V20182, showing fibrolamellar bone with relatively large and rounded vascular canals and poorly defined marrow cavity; scale bar = 1 mm; a2, the same cross section in a1 with the vascular canals highlighted in green; scale bar = 1.2 mm; b1, cross section of the tibia of IVPP V20183, showing fibrolamellar bone with compacted, longitudinal and concentrically arranged vascular canals, and a well defined marrow cavity; scale bar = 1.2 mm; b2, the same cross section in b1 with the vascular canals highlighted in green; scale bar = 1.2 mm; Abbreviations: MC, marrow cavityBack to article page