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In this paper, we revised the taxonomy of the Tuberculatus quercicola group, myrmecophilous drepanosiphine aphids that are associated with Quercus dentata and Q. crispula in Japan, based on morphometry and molecular phylogeny. This species group has been recognized as T. quercicola with some junior synonyms. Morphometric analysis of 11 morphological characters divided the group into three clusters:...
Mutualistic interactions between aphids and ants are mediated by the honeydew produced by aphids. Previous work showed that when attended by the ant Formica yessensis, nymphs of the aphid Tuberculatus quercicola developed into significantly smaller adults with lower fecundity than when not ant-attended. This study tested the hypothesis that this cost of ant attendance arises through changes in the...
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