Fig. 3 in Growth dynamics and body size evolution of South American long-necked chelid turtles: A bone histology approach

Fig. 3. Stylopodial bone histology of chelid turtle Yaminuechelys maior (Staesche, 1929), Cerro Hansen, Danian, Paleocene of Salamanca Formation, Chubut Province, Argentina (Bona and De la Fuente 2005). A. MPEFPV-599, humerus: dorsal (A1), dorsomedial (A2), dorsolateral (A3), and lateral (A4) areas. B. MLP-14-9-23-1, humerus: lateral (B1), dorsal (B2), medial (B3), and ventral (B4) areas. Arrowheads in A1 and B4 indicate lines of arrested growth. C. MPEFPV-599, femur: dorsal (C1), dorsolateral (C2), and ventral (C3, C4) areas. Photographs under normal light (A1, A4, B3), under polarized light (C4), under polarized light with lambda compensator (A2, A3, B1, B2, B4, C1–C3). Abbreviations: LVC, simple longitudinal vascular canals; PFB, parallel-fibered bone; RS, resorption cavities; RVC, simple radial vascular canals; SF, Sharpey's fibres.