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Osteohistology of Edmontosaurus annectens tibiae from the Ruth Mason dinosaur quarry of South Dakota, United States under plain‐polarized (PP) and cross‐polarized (XP) light microscopy. (a, b) Late juvenile (ROM 67603). (c, d) Early subadult (ROM 67795). (e, f) Early adult (ROM 67793). (g, h) Late adult (ROM 73853). Scale bars are 0.5 cm. L, laminar; MC, medullary cavity; P, plexiform; R, reticular
