part of overlaps start stage end stage premaxilla ZFA:0000567 premaxillae TAO:0000567 The premaxilla is a bone of the upper jaw. It is an L-shaped bone first visible as a thin sliver in the anterodorsal region of the upper lip, anterior to the dorsal tip of the maxilla (5.7 mm). In the adult, the premaxilla is ligamentously attached to its counterpart at the midline and the kinethmoid posterodorsally, by the premaxillo-rostroid ligaments. Premaxillary teeth are absent in zebrafish. zebrafish_anatomy dermatocranium palatoquadrate arch dermal bone inter-premaxillary joint unknown adult