Fig. 3. Phenotypic series for Tc'Kr: ventral views of first instar larvae (confocal image projections based on cuticle autofluorescence). (A,B) Wild-type first instar larva (A). (B) Enlarged view of the ventral head, with left maxilla and labium outlined in white. (C-E) Tc'Kr RNAi embryos of increasing phenotypic strength. (F) Tc'Kr^jaws mutant embryo. Appendages resembling maxilla are labelled with arrows, those resembling labial palps with arrowheads. In some embryos, the urogomphi and pygopodes, corresponding to the 9th and 10th abdominal segments, respectively, are also indicated. For detailed phenotypic description see Results. The embryo in F is at a higher magnification than those in A-E. mx maxilla; lb labium; T1 to T3, thoracic segments 1 to 3; A1 to A8, abdominal segments 1 to 8; pp, pygopod; ug, urogomphi.