part of part of in taxon Amphibia saliva-secreting gland roof of mouth intermaxillary salivary gland A gland located at the pre-nasal area being divided anteriorly by the ascendent processes of the intermaxillary bone. The intermaxillary gland is the first salivary gland to appear in the vertebrate evolution. Its duct system is uniformly lined by ciliated cells and scattered secretory cells. This indicates that in the evolution, of salivary glands, there was a diversification of the duct system, together with progressxve concentration of secretory cells in special áreas of this system intermaxillary gland UBERON:0017653 Although usually described in the literature as mucous, the secretory cells of the intermaxillary gland have serous characteristics.