anteclypeus
/ˌantɪˈklɪpɪəs/Entomology
noun
In the mouthparts of some insects: the lower section of a divided clypeus, situated between the postclypeus and the labrum.
Origin
Late 19th century; earliest use found in Alpheus Packard (1839–1905). From ante- + clypeus, after postclypeus.