what is formed by maxillae
The labium is immediately posterior to the first maxilla and is formed from the fusion of the second maxillae, although in lower orders including the Archaeognatha (bristletails) and Thysanura (silverfish) the two maxillae are not completely fused.
Hemiptera is formed from the mandibles, maxillae and the labium. The labium forms the protective sheath that folds back during feeding. The mandibles form the outer stylets that surround the inner stylets. The laciniae of the maxillae form the inner stylets with the food and salivary channels. â¢ The sucking pump is formed in the cibarium. Negative pressure is generated by the enlargement of the cibarial dilator muscle attached to the clypeus. â¢ The sucking tube in the Anoplura is formed by the labium.