Deciphering the onychophoran 'segmentation gene cascade': Gene expression reveals limited involvement of pair rule gene orthologs in segmentation, but a highly conserved segment polarity gene network
Keywords: Onychophora; Development; Even-skipped; Runt; Hairy; Odd-skipped; Odd-paired; Sloppy-paired; Paired; Pairberry; Hedgehog; Patched; Cubitus-interruptus; Notum;