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Asian Myrmecology, Volume 10, e010008, pages 1-31, online first (online version of paper published before print issue)

Taxonomy of the Leptogenys chalybaea species group (Hymenoptera, Formicidae, Ponerinae) from Southeast Asia

KÔICHI ARIMOTO1, 2, * AND SEIKI YAMANE3

1Entomological Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Hakozaki 6–10–1, Fukuoka, 812–8581 Japan

2JT Biohistory Research Hall, Murasaki Town 1–1, Takatsuki City, Osaka, 569–1125, Japan

3Kagoshima University Museum, Kagoshima, 890–0065 Japan

Article first published online 01/August/2018

DOI: 10.20362/am.010008

Asian Myrmecology 10: e010008 (1-31)

© K. Arimoto and S. Yamane

Leptogenys atra sp. n., L. chalybaea, and L. cyanicatena sp. n. are described from Southeast Asia. These three species are distinguished from other congeners by their eye position and the shapes of the clypeal median lobe and petiolar node. The L. chalybaea species group is proposed based on the similarity of these three species. A key to the species in this group is provided. Colonies of this group contain many ergatoid queens, of which virgin queens do not reproduce, but instead remain in the colony. We believe that they form a multi-purpose caste that can either reproduce or function as helpers. Chain-making behavior for the collective transport of food was confirmed in L. atra and L. cyanicatena. Furthermore, as supporting information, an update key to the Oriental species of Leptogenys is presented.

Keywords: ants, new species, Oriental region, Ponerini, redescription

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