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Ontogenetic sampling of the bony tissue from the dorsal quadrant. Scale bars = 100 μm (A–I) and 500 μm (J–L). Superficial is up, deep is down, anterior is to the left, posterior is to the right. Specimens 1–7, general view under circularly polarized light (A,C,E,H,J,K,L). Detailed view under non-polarized light (B,D,F,G,I). Resorption cavity (RC), longitudinal canal (Lg), transverse canal (Ts).
