Clypeus

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The clypeus is one of the sclerites that makes up the "face" of an arthropod. In insects, the clypeus delimits the lower margin of the face, with the labrum articulated along the ventral margin of the clypeus. The mandibles bracket the labrum, but do not touch the clypeus. The dorsal margin of the clypeus is below the antennal sockets. The clypeus is often well-defined by sulci ("grooves") along its lateral and dorsal margins, and is most commonly rectangular or trapezoidal in overall shape. In spiders, the clypeus is generally defined as the area between the anterior edge of the carapace and the anterior eyes.In the military of classical antiquity, a clipeus (Ancient Greek: ) was a large shield worn by the Greeks and Romans as a piece of defensive armor, which they carried upon the arm, to secure them from the blows of their enemies. It was round in shape and in the middle was a bolt of iron, or of some other metal, with a sharp point.... Mehr