Summary
A closing apparatus of the Dufour gland is described in the formicine ant Formica sanguinea Latreille 1798. Four sets of muscles are involved, two of which directly attach to the slit-like duct. The latter shows a considerable cuticular thickening of its intima at this level. Ultrastructural observations reveal that the muscles are attached to a cuticula by means of intracellular microtubules in the duct cells. These microtubules run parallel to the myofilaments. Together with the increased contact area for muscular attachments they are believed to ensure the accurate muscular mechanism assuring a well-controlled spraying activity of this gland. Opening of the duct is probably achieved by active muscular contractions, while its closure may be achieved by a passive return to the rest position of the thickened cuticular intima.
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Research assistant of the Belgian National Fund for Scientific Research
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Billen, J.P.J. The Dufour gland closing apparatus in Formica sanguinea Latreille (Hymenoptera, Formicidae). Zoomorphology 99, 235–244 (1982). https://doi.org/10.1007/BF00312297
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DOI: https://doi.org/10.1007/BF00312297