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Figure 3. Osteological structures of: (a–c) Listrura gyrinura sp. nov.; (d–f) Listrura urussanga sp. nov.: (a, d) mesethmoidal region and adjacent structures, left and middle portions, dorsal view; (b, e) left suspensorium and opercular series, lateral view; (c, f) parurohyal, ventral view. Abbreviations of structures indicated by arrows are: aap, articular autopalatine process; ppp, parurohyal posterior process. Larger stippling represents cartilaginous areas.