Fig. 3

Palaeognath laryngeal elements. a-b, Cassowary, Casuarius casuarius, FUR180; dorsal view, scale bar = 10mm. c Rhea, Rhea americana, adapted from Crole and Soley ([49], fig. 7); dorsal view. d Ostrich, Struthio camelus, adapted from Tadjalli ([47], fig. 9a, b); dorsal view. e Tinamou, Nothura maculosa, MMC321; ventral view. f Moa, Euryapteryx curtus, NMNZ S. 44757; lateral and ventral views. g Kiwi, Apteryx rowi, NMNZ OR.27243A; dorsal view. Abbreviations: ar: arytenoids, cr.c: cricoid cartilage, cr.w: cricoid wings, oss: ossification, pc: procricoid, tr.c: tracheal cartilages