Figure 2. A in New morphological evidence supports congruent phylogenies and Gondwana vicariance for palaeognathous birds

Figure 2. A, hyobranchial skeleton of Megalapteryx and Apteryx, ventral view. B, tongue muscles typical of a neognathous bird (Tringa totanus) after Burton (1974), ventral view. C, tongue muscles of Apteryx australis, ventral view. Abbreviations: B, basihyale; Bm, m. branchiomandibularis; Cb, ceratobranchiale; Cg, m. ceratoglossus; Cga, m. ceratoglossus anterior; Ch, m. ceratohyoideus; Eb, epibranchiale; Gh, m. geniohyoideus; Ho, m. hyoglossus obliquus; M, mandible; Mh, m. mylohyoideus (reflected back from the midline); P, paraglossale; St, m. stylohyoideus; T, tongue; Tl, m. transversus linguae; U, urohyale. Scale bars = 1 cm.