part of larval labrum larval clypeus larval palatum Fig 38 Abbr: Pal in ISBN:0-937548-00-6. TGMA:0001106 TGMA:0001106 The oral surfaces of the labrum and clypeus, bounded posteriorly by mouth, limited arbitrarily laterally by the lateral margins of clypeus and the usual dorsal sclerite(s) of the labrum; divided into the labropalatum and clypeopalatum. In mosquito larvae, the entire labral wall except the median labral plate is considered to be palatal, as is the roof of the cibarium between the lower lateral margins of the clypeus. default_namespace epipharynx anatomical surface