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Fig. 7. Different fates of early larval melanophores, and variation in adult melanophore origins across species. All values are means±s.e.m. (A) Total numbers of early larval melanophores differ somewhat across species (F_6,25=4.44, P<0.005); black letters within bars indicate post-hoc Tukey comparisons of means and bars sharing the same letter do not differ significantly, thus only D. nigrofasciatus and D. kyathit differ significantly from one another. Total early larval melanophores for each species comprise melanophores that remain in the early larval pigment pattern during metamorphosis (light gray), and melanophores that leave the early larval stripes during metamorphosis and localize further laterally over the flank (brown). Different proportions of early larval melanophores leave the adult stripes in the different species (arcsine transformed proportions, F_6,25=41.88, P<0.0001). However, post-hoc means comparisons of numbers and proportions indicate that D. nigrofasciatus alone differs significantly from other species (brown letters within bars). (B) Pigment patterns after metamorphosis differ markedly in total melanophore numbers across species (F_6,25=18.93, P<0.0001). In all species, a majority of melanophores in the adult pigment pattern are metamorphic melanophores. Numbers of early larval neural crest-derived melanophores in the adult pattern are the same as in A. In adult pigment patterns, the proportions of early larval melanophores to metamorphic melanophores differ significantly among species (arcsine transformed proportions, F_6,25=54.56, P<0.0001), yet only D. nigrofasciatus differs significantly from other species in post-hoc means comparisons. nigrof, D. nigrofasciatus; kyath, D. kyathit; alb, D. albolineatus; T. alb, T. albonubes.

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