Scanning electron photomicrographs of third instar of Anastrepha korytkowskii 53 pseudocephalon 54 oral ridges 55 antenna and maxillary palp 56 preoral organ 57 ventral surface of mouthhook. Abbreviations: CLP, comb-like processes. Scale bars: 10 μm (55–57); 20 μm (54); 50 μm (53).