Fig. 8

Fig. 8 (A) Alkaline phosphatase staining reveals that in sdf1a mutant zebrafish, the posterior lateral line primordium has not migrated all the way to the tail tip. However, the anterior lateral line neuromasts have formed normally around the eye and on the lower jaw (black arrow). Images from Mark Lush and T.P. (B) Stone (1928b) transplanted pre-otic ectoderm from a donor spotted salamander (Ambystoma maculatum; A. punctatum) embryo (on the right of the diagram) into the position of the posterior lateral line placode of the host embryo (on the left of the diagram). The placode migrated or extended and gave rise to a defined number of neuromasts (bottom image, embryo with gills and forelimb) (reproduced from Stone, 1928b). (C) Reciprocally, Stone (1928b) transplanted post-otic ectoderm into the position of the pre-otic supraorbital lateral line primordium and reversed its orientation by 180 degrees. The transplanted placode migrated or extended around the eye and differentiated into neuromasts (reproduced from Stone, 1928b). (D,E) The morphology of the lateral line is diverse between different species of teleosts (reproduced from Coombs et al., 1988 with permission from Springer Verlag). (D) Cichlid with an interrupted trunk line. (E) Triggerfish with a zig-zag shaped lateral line.