Fig. 13 in Early Frasnian acanthodians from central Iran

Fig. 13. SEM micrographs of ischnacanthiform jaw bone fragments from early Frasnian, horizon GI4 of an unnamed formation in the Chahriseh section, Kaftari Mt., central Iran. A. First type of fragment. AEU 321 in mesial (A1) and occlusal (A2) views. B, C. The second type of fragment in occluso−lateral view. B. AEU 322. C. AEU 323.