(noun; Latin clypeus
, shield): 1. (Arthropoda
) The anterior tagma
between eyes and cheliceral bases in arachnids.
2. (Arthropoda: Crustacea) That part of the head bearing the labrum.
3. (Arthropoda: Insecta) The sclerite on the lower part of the face, usually separated from the frons by an epistomal sulcus or suture, and maybe divided into an anteclypeus and a postclypeus.
4. (Brachiopoda) That part of the cephalon bearing the labrum; a plate situated anteromedially on the head formed by fusion of basal segments of the antennae.