Fig. 7 in Early Frasnian acanthodians from central Iran

Fig. 7. Climatiid acanthodian Nostolepis sp. cf. N. gaujensis Valiukevičius, 1998 from early Frasnian, horizon GI4 of an unnamed formation in the Chahriseh section, Kaftari Mt., central Iran. Photomicrographs of vertical transverse sections of specialised scales from the lateral sensory line. A. Thin section LIGG 3816. A1, general view of a scale sectioned through the central base part and showing growth characters; A2, the anterior, left part of the same scale at higher magnification exposing distribution of densely cellular mesodentine and stranggewebe in growth zones of crown, and structure of adjacent base part showing large numbers of osteocytes and long Sharpey's fibre bundles. B. Thin section LIGG 3817. B1, structure of odontocytic mesodentine in the anterior crown part; B2, finely networked mesodentine incorporating densely concentrated osteocytes in growth zones of crown, at high magnification. C. Thin section LIGG 3818 showing general view (C1) and a small portion of the short−lacunal stranggewebe developed in the crown amongst the odontocytic mesodentine (at higher magnification, C2) characteristic of most of the crown. Scale bars 0.1 mm.