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  • 1
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die mandibularen Drüsen der AmeiseWasmannia auropunctata enthalten 2,5-dimethyl-3-isopentylpyrazin, eine Verbindung mit der andere gleich-artige Nestbewohner von gestorten Arbeitern herbeigelockt werden. Während einer aggressiven interspezifischen Begegnung kann die kleine Ameise das Alkylpyrazin als ein Abstossungsmittel benutzen und ihren Opponenten noch dazu mit ihrem wirkungsvollen giftigen Stich untauglich machen. Alkylpyrazine sind schon früher in Vertreten der Unterfamilien Ponerinæ, Formicinæ und Dolichoderinæ gefunden worden, jedoch ist dies der erste Bericht über Alkylpyrazine in den mandibularen Drüsen einer Art der Myrmicinæ.
    Notes: Summary Mandibular glands of the ant,Wasmannia auropunctata, contain 2,5-dimethyl-3-isopentylpyrazine, a compound which attracts nestmates to disturbed workers. During interspecific aggressive encounters, this small ant may utilize the alkylpyrazine as a repellent as well as disabling opponents with its potent sting venom. Alkylpyrazines have been previously identified as cephalic products from ants of the subfamilies Ponerinæ, Formicinæ, and Dolichoderinæ but this is the first report of an alkylpyrazine from the mandibular glands of a member of the Myrmicinæ.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-1561
    Keywords: Tapinoma melanocephalum ; Tapinoma erraticum ; pygidial gland ; sternal gland ; actinidine ; chemistry ; attractant ; arrestant ; repellent ; alarm behavior ; cephalic extract ; Solenopsis geminata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Volatile constituents produced by ant workers belonging to the speciesTapinoma melanocephalum andT. erraticum have been analyzed by gas chromatography-mass spectrometry. The pygidial (=anal) gland secretion ofT. melanocephalum is fortified with 6-methyl-5-hepten-2-one and actinidine (the mass spectrum of which is corrected in this paper). An unidentified compound was detected in cephalic extracts. The pygidial gland secretion ofT. erraticum was also dominated by 6-methyl-5-hepten-2-one, in addition to two isomers of iridodial, and iridomyrmecin. The sternal glands contained iridodial and C15-C20 hydrocarbons. Workers ofT. melanocephalum effectively utilize their pygidial gland secretions as an alarm-defense system during aggressive encounters with workers ofSolenopsis geminata. 6-Methyl-5-hepten-2-one is active as a releaser of alarm behavior, and actinidine is repellent to workers ofT. melanocephalum. Cephalic extracts possessed attractant and arrestant properties for workers of this species.
    Type of Medium: Electronic Resource
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