Figure 1 in Developmental patterns of the crocodilian and avian columella auris: reappraisal of interpretations of the derivation of the dorsal hyoid arch in archosaurian tetrapods

Figure 1. Development of the columella auris and surrounding tissues of Alligator mississippiensis. A, day-12 embryo, right lateral view. B, C, and E, day-14 embryo, postero-left lateral, posterior, and right lateral view. D and F, day-14 embryo, transverse sections through the external and middle ear region. G and H, day-16 embryo, transverse sections through the external and middle ear region. I, day-18 embryo, right lateral view. For abbreviations see the Appendix. In all figures hyal elements are distinguished in all whole mounts by yellow labels. A and I, whole mounts; B, C, and E, graphic reconstructions; D, and F–H, histological sections.