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Morphological Differences Between Sexes in the Ponerine Ant Diacamma sp. (Formicidae: Ponerinae)

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Title: Morphological Differences Between Sexes in the Ponerine Ant Diacamma sp. (Formicidae: Ponerinae)
Authors: Okada, Yasukazu Browse this author
Tsuji, Kazuki Browse this author
Miura, Toru Browse this author →KAKEN DB
Keywords: Diacomma sp.
sex related micromorphological differences
gender life strategies
Issue Date: 2006
Publisher: California State University, Chico
Journal Title: Sociobiology
Volume: 48
Issue: 2
Start Page: 527
End Page: 541
Abstract: We report herein detailed morphological differences between sexes in the ponerine ant Diacamma sp. The female individuals of this species show monomorphism, making them particularly suitable among the social hymenopterans for comparing adult sexual traits and developmental processes. Our observations revealed some intriguing sex-specific characteristics. For example, antennal sensilla are gender-specialized in these ants; males possess sensilla coeloconica, thought to respond to air conditions, while females possess a particular type of sensilla basiconica that is a putative contact chemoreceptor. The antennal cleaners in the foretibiae of the legs are also sex-specific, in addition to the trichome patterns on the spurs in the mid- and hind tibiae. Furthermore, only male tarsal claws have a denticle inside the claw, and the male posterior abdomen has a hook-like curved spine at the edge of the eighth tergite. This spine is thought to facilitate the tight connection of a mating pair. Based on these findings, we hypothesized that most of the sexually dimorphic traits are morphologically specialized for and thus function in the different gender life strategies, such as flight ability, lifespan, and male suicidal copulation.
Type: article (author version)
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三浦 徹

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