Fig. 9

Summary of gene expression during Lineus ruber embryonic development. A–C Schematic representation of the expression patterns of anterior, endomesodermal, and posterior markers, respectively, in the Schmidt’s larva and early juvenile of L. ruber. A The anterior/head markers foxQ2, six3/6 and otx are expressed in the cephalic imaginal discs and head of the juvenile. Additionally, otx is expressed in the gut of the Schmidt’s larva and scattered dorsal cells of the juvenile trunk. The gene gsc is expressed in two antero-lateral clusters of the Schmidt’s larva and in the cerebral organs of the juvenile. B The endodermal genes foxA and GATA456 are complementary expressed in the blind gut of the Schmidt’s larva and early juvenile. The mesodermal gene twist-a is expressed broadly in all imaginal discs and juvenile tissues. C The posterior markers evx and cdx are expressed in the posterior end of the Schmidt’s larva and juvenile. The depicted expression patterns are for guidance and not necessarily represent exact expression domains. Dots of color indicate overlapping expression. The ingested yolk is depicted with a light blue circle. Drawings are not to scale