part of develops from start stage end stage anatomical line forebrain midbrain boundary neural keel anterior neural rod forebrain midbrain boundary neural rod diencephalic-mesencephalic boundary neural rod ZFA:0007033 TAO:0007033 zebrafish_anatomy Portion of anterior neural rod that gives rise to the forebrain midbrain boundary neural tube. segmentation:5-9 somites segmentation:10-13 somites