Fig. 2 in Ontogenetic stages of ceratopsian dinosaur Psittacosaurus in bone histology

Fig. 2. Bone microstructure in hatchling ceratopsian dinosaur Psittacosaurus lujiatunensis Zhou, Gao, Fox, and Chen, 2006 (IVPP V16902.1) from western Liaoning, China, Early Cretaceous. A–C. Mid-diaphyseal transverse section of tibia (A) and details (B, C); photographs in regular transmitted light (A1–C1), elliptically polarized light (A2–C2), crossed plane-polarized light (B3, C3). A3, line drawing showing longitudinal vascular canals (navy), reticular vascular canals (green) and radial vascular canals (red). Arrows indicate simple primary vascular canals.