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Journal Article

Chemical Evolution and Chemosystematics of the Dufour's Gland Secretions of the Lactone-Producing Bees (Hymenoptera: Colletidae, Halictidae, and Oxaeidae)

James H. Cane
Evolution
Vol. 37, No. 4 (Jul., 1983), pp. 657-674
DOI: 10.2307/2407908
Stable URL: http://www.jstor.org/stable/2407908
Page Count: 18

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Topics: Dufours gland, Bees, Secretion, Biosynthesis, Insect morphology, Esters, Lipids, Lactones, Evolution, Chemicals
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Chemical Evolution and Chemosystematics of the Dufour's Gland Secretions of the Lactone-Producing Bees (Hymenoptera: Colletidae, Halictidae, and Oxaeidae)
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Abstract

The evolution of the lipid secretions from the exocrine Dufour's glands of lactoneproducing bees (Colletidae, Oxaeidae, and Halictidae) can be specified by a cladistic analysis of molecular structure coupled with an ecological understanding of chemical function. Chemocladistic patterns indicate 1) a uniquely shared ancestry for the analyzed representatives of these three families (except for the halictid subfamily Dufoureinae) that unites them as a single clade within the Apoidea, 2) the inclusion of the Oxaeidae within the Colletidae, possibly near the Diphaglossinae, 3) a phylogenetic pattern within the Colletidae suggesting a relatively primitive Colletinae and derived Hylaeinae, and 4) the exclusion of the Dufoureinae from the Halictidae. All remaining phylogenetic conclusions are concordant with most morphological classifications. The chemical cladogram of lactone bees is supported by a priori evolutionary predictions of insect lipogenesis. Ancestry best predicts the molecular structures of lipoidal constituents of the Dufour's gland secretion, while chemical ecology specifies the secretion's relevant physical properties. Differences in the morphologies and relative biosynthetic activities of Dufour's glands are compared. The Dufour's gland lipids of species from the Sphecoidea, Diphaglossinae (including cell lining lipid composition), Dufoureinae and Oxaeidae are described for the first time.

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