Abstract
The Dufour glands of workers of the two subspecies Atta sexdens and Atta sexdens rubropilosa are completely filled with linear alkanes and alkenes in the C 15 to C 23 chain length range in microgram amounts. There are quantitative differences in the hydrocarbon composition between workers of the two subspecies. The major glandular component of A. s. sexdens is (Z)-9-tricosene, in A. s. rubropilosa the most abundant component is (Z)-9-nonadecene. From a chemical taxonomic viewpoint A. s. rubropilosa and A. s. sexdens could be regarded as separate species. The Dufour gland of Atta cephalotes is only partially filled with linear alkanes and alkenes in the C 12 to C 19 chain length range in nanogram amounts; n- heptadecane is the most abundant alkane and (Z)-9-nonadecene is the most abundant alkene.
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