part of overlaps develops from start stage end stage otic region epiotic Cartilage bone that contacts the pterotic anteriorly, the supraoccipital and parietal dorsally, and the exoccipital ventrally. The epiotic enclose the posterior semicircular canal of the inner ear and contribute to the hind margin of the cranium. epioccipital zebrafish_anatomy ZFA:0000659 TAO:0001412 ZFA:0001412 chondrocranium auditory capsule neurocranium endochondral bone epiotic-posttemporal joint epiotic-parietal joint larval:days 21-29 adult