Figure 1.

Ontogenetic interpretation of the known jaw fragments of Alanqa saharica (all drawn at the same magnification; specimen numbers are shown on the figure; reversed images are marked by asterisk). A–D rostrum fragments, in lateral and ventral views E, F fragments of mandibular symphysis, in dorsal and lateral views. Figures are modified from Wellnhofer and Buffetaut 1999 (A, D, E), Kellner et al. 2007 (B), Rodrigues et al. 2011 (C), and Ibrahim et al. 2010 (F). The arrow indicates the beginning of the sagittal crest on the cross sections of the rostra. Abbreviations: naof – nasoantorbital fenestra; sc – sagittal crest.