Labial gland

The labial gland is an exocrine gland in the area of the lower lip ( labium ) in the insect's head. As a rule, it is designed as a salivary gland and flows into the so-called salivarium in the area of the hypopharynx . In butterfly caterpillars , larvae of caddis flies and hymenoptera , the labial gland can be transformed into spinnerets with which they can spin silk threads .

The labial gland extends into the first breast section ( prothorax ). It usually consists of grape-shaped (acinous) salivary glands and a bladder containing excreta, which lead into a common outlet duct.

supporting documents

↑ ^a ^b labial gland. In: Herder-Lexikon der Biologie. Spektrum Akademischer Verlag, Heidelberg 2003, ISBN 3-8274-0354-5 .
^ Bernhard Klausnitzer: Insecta (Hexapoda), insects. In: W. Westheide, R. Rieger (Ed.): Special Zoology. Part 1: Protozoa and invertebrates. Gustav Fischer Verlag, Stuttgart / Jena 1996, p. 609.
^ Bernhard Klausnitzer: Insecta (Hexapoda), insects. In: W. Westheide, R. Rieger (Ed.): Special Zoology. Part 1: Protozoa and invertebrates. Gustav Fischer Verlag, Stuttgart / Jena 1996, p. 607.

[Herder-1] labial gland. In: Herder-Lexikon der Biologie. Spektrum Akademischer Verlag, Heidelberg 2003, ISBN 3-8274-0354-5 .

[2] Bernhard Klausnitzer: Insecta (Hexapoda), insects. In: W. Westheide, R. Rieger (Ed.): Special Zoology. Part 1: Protozoa and invertebrates. Gustav Fischer Verlag, Stuttgart / Jena 1996, p. 609.

[3] Bernhard Klausnitzer: Insecta (Hexapoda), insects. In: W. Westheide, R. Rieger (Ed.): Special Zoology. Part 1: Protozoa and invertebrates. Gustav Fischer Verlag, Stuttgart / Jena 1996, p. 607.