Fig. 6 in Early Frasnian acanthodians from central Iran

Fig. 6. 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 thin sections of flank scales. Vertical longitudinal sections (A, B) and vertical transverse section (C) of the central part of scales. A. Thin section LIGG 3795. A1, structure of?orthodentine in the outer layers and odontocytic mesodentine in the inner parts of growth lamellae in crown anteriorly (left part); A2, magnified area of the anterior crown part exposing unipolar, more outwardly−oriented dentine tubules emanating from large, rounded odontocytes. B. Thin section LIGG 3796. B1, scale exposing cellular bone in base, portions of?orthodentine and stranggewebe tissues respectively in the anterior and posterior crown parts; B2, orientation of elongated osteocyte cells along the growth lines in the apex of base, and probably stranggewebe at the base/crown junction, at higher magnification; B3, magnified part of the anterior crown with the orthodentine−like tissue. C. Thin section EUIV 412 showing a dense lamellarity of cellular bone in scale base with plenty of osteocytes, stranggewebe in the lower crown, and partly bush−like odontocytic mesodentine in the outer parts of growth zones in crown. Scale bars 0.1 mm.