Fig. 3
Expression of bHLH orthologs in embryos and juveniles of the acoel S. roscoffensis. First and third columns show the expression patterns in embryos, 12–24 h post-fertilization. Second and fourth columns correspond to juveniles from 12 to 24 h post-hatching juveniles. Names of the corresponding ortholog genes are indicated in each panel. Asterisk indicates the location of the anterior pole of the embryo. Arrowhead indicates the position of the statocyst and therefore the anterior part of the juvenile. Embryos scale bar 60 μm; Juveniles scale bar 100 μm