part of start stage end stage infraorbital infraorbital 5 dermosphenotic ZFA:0000495 TAO:0000495 zebrafish_anatomy Plate like dermal bone with usually only one neuromast pore (Nelson, 1969). The last infraorbital bone in the series is referred to as the dermosphenotic (Nelson, 1969). In basal teleosts it is usually the sixth bone in the series but in zebrafish it is the fifth bone. infraorbital series juvenile:days 30-44 adult