Studies on the ontogeny of Streptopelia senegalensis aegyptiaca (latham, 1790). 4-Post hatching development of the cartilaginous nasal capsule Total body length of nestling 64 mm

In the post hatching stage of the chondrocranium of Streptopelia, resorption of the intertrabecular bar can now be observed along its whole length. It is most conspicuous in the anterior tip of the prenasal process. The nasal septum is affected by the resorption process. It is now a thin plate. Anteriorly, there is no evidence for the formation of a fenestra septi nasi. The dorsal border of the nasal septum merges with the parietotectal roof above it and with the medial walls of the cupolae. The development of a well chondrified blunt process projecting freely backwards from the posterior margin of the vestibular solum nasi at a point that lies in close vicinity to the intertrabecular bar. The concha nasalis (=paranasal cartilage) becomes extensive and more deep. The postprofundal process shows an upward elongation. The processus paraseptalis posterior becomes much more developed.