the lower portion of the face between the front and the labrum
a sclerite on the lower part of the face, between the frons and the labium.
Median region of the head above the mouth that is often distinguished from the rest of the lower face by a difference in sculpture, but whose exact boundaries sometimes are indicated by the epistomal sulcus. [drawing][photo
An unpaired anterior unit of the cephalon bearing the labrum medially and the mandibular fossae ventrally on its lateral margin. The articular condyles of the mandibles insert in these fossae, or ventral grooves. In some species (e.g., the Eugerda fulcimandibulata species complex, Desmosomatidae) the external margins of the fossae project anteriorly as rounded knobs.The clypeus articulates with the head across the anteroventral surface and with the labrum on its ventral margin with distinct suture lines.
that part of the insect head below the frons (face) and above the labrum. The clypeus is highly variable in size and shape. For example, in the Diptera (flies, mosquitoes, etc.) the clypeus is often visible below the margin of the mouth as a visor-shaped piece. View image
The area of the head between the frons and the labrum.
a shield-like plate on the front of an insect's head
anterior sclerite above labrum and below frons on head.
The medial sclerite of the head immediately above the labrum; often defined dorsally and laterally by the epistomal groove.
The area of the facial wall between the labrum and the frons (upper anterior portion of the head) in insects, usually separated from the latter by a groove.
a shield-like growth over a perithecium.
The clypeus is the hard plate on the top of an of insect's head (part of its exoskeleton). The butterfly's labrum (upper lip) is at the bottom edge of the clypeus.