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      The Aenictus ceylonicus species group (Hymenoptera, Formicidae, Aenictinae) from Southeast Asia

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      Journal of Hymenoptera Research

      Pensoft Publishers

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          Abstract

          The genus Aenictus is a diverse group of army ants in the Old World tropics and subtropics. The Southeast Asian species of the Aenictus ceylonicus group are revised to include twenty-three species (4 named and 19 new species): Aenictus appressipilosus sp. n., A. baliensis sp. n., A. brevipodus sp. n., A. concavus sp. n., A. cylindripetiolus sp. n., A. eguchii sp. n., A. formosensis Forel, 1913 stat. n., A. fuchuanensis Zhou, 2001, A. gonioccipus sp. n., A. itoi sp. n., A. jawadwipa sp. n., A. khaoyaiensis sp. n., A. lifuiae Terayama, 1984, A. longicephalus sp. n., A. maneerati sp. n., A. minipetiolus sp. n., A. pilosus sp. n., A. pinkaewi sp. n., A. sundalandensis sp. n., A. thailandianus Terayama & Kubota, 1993, A. watanasiti sp. n., A. wilaiae sp. n., and A. wiwatwitayai sp. n. Aenictus ceylonicus var. formosensis Forel is removed from synonymy with A. ceylonicus and raised to full species. Lectotype and paralectotypes are designated for A. ceylonicus. Redescriptions of Aenictus ceylonicus (Mayr, 1866) (India and Sri Lanka) and A. doryloides Wilson, 1964 (India) are provided. The queen of A. cylindripetiolus is described. A key to the Southeast Asian species of the group is given based on the worker caste. Most of the Southeast Asian species of this species group have more or less limited distribution ranges. This may be due to the poor dispersal ability generally seen among the Aenictus species, in which the propagule (reproductive unit) is an apterous queen plus accompanying workers.

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          Most cited references 9

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          Synopsis of Aenictus species groups and revision of the A. currax and A. laeviceps groups in the eastern Oriental, Indo-Australian, and Australasian regions (Hymenoptera: Formicidae: Aenictinae)

          Twelve species groups are established in the ant genus Aenictus of the eastern part of Oriental region, and Indo-Australian and Australasian regions, and the species of the Aenictus currax group and A. laeviceps group are revised. Nine species (six named and three new species) of the A. currax group occurring in this area are: A. cornutus Forel, A. currax Emery, A. diclops Shattuck, A. glabrinotum Jaitrong et Yamane, sp. nov., A. gracilis Emery, A. huonicus Wilson, A. parahuonicus Jaitrong et Yamane, sp. nov., A. pfeifferi Zettel et Sorger, and A. wayani Jaitrong et Yamane, sp. nov. Thirteen species (six named and seven new species) are recognized in the A. laeviceps group: A. alticola Wheeler et Chapman, A. binghami Forel, A. bodongjaya Jaitrong et Yamane, sp. nov., A. breviceps Forel, stat. nov., A. brevinodus Jaitrong et Yamane, sp. nov., A. fulvus Jaitrong et Yamane, sp. nov., A. hodgsoni Forel, A. laeviceps (F. Smith), A. luzoni Wheeler et Chapman, A. montivagus Jaitrong et Yamane, sp. nov., A. rotundicollis Jaitrong et Yamane, sp. nov., A. siamensis Jaitrong et Yamane, sp. nov., and A. sonchaengi Jaitrong et Yamane, sp. nov. A. fergusoni var. breviceps Forel is removed from synonymy with A. laeviceps and raised to full species. Lectotypes and paralectotyps are designated for A. alticola, A. binghami, A. breviceps, A. cornutus, A. currax, A. gracilis, A. laeviceps, and A. luzoni.
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            Review of the ant genus Aenictus (Hymenoptera: Formicidae) in Australia with notes on A. ceylonicus (Mayr)

            The Australian members of the ant genus Aenictus are revised. Eight species were found to occur in Australia with three described as new (acerbus sp. n.., aratus Forel, diclops sp. n., hilli Clark, nesiotis Wheeler and Chapman, philiporum Wilson, prolixus sp. n. and turneri Forel). A. hilli is known only from males and its relationship to the remaining workerbased species is uncertain. Of the seven worker-based species, five are restricted to Australia, one is shared with Papua New Guinea and one is shared with Papua New Guinea and the Philippines. Aenictus aratus nesiotis Wheeler and Chapman is removed from synonymy with A. aratus and raised to full species, A. pachycerus impressus Karavaiev is newly synonymised with A. aratus and A. turneri is removed from synonymy with A. ceylonicus (Mayr). Additionally, the following changes are proposed for non-Australian species: A. aitkenii Forel is removed from synonymy with A. aratus, A. aratus asiatica Forel is removed from synonymy with A. aratus and synonymised with A. aitkenii, A. levior Karavaiev is removed from synonymy with A. aratus and raised to full species, A. orientalis (Karavaiev) is removed from synonymy with A. ceylonicus, A. papuanus Donisthorpe is removed from synonymy with A. ceylonicus and, together with A. similis Donisthorpe, is newly synonymised with A. orientalis. A lectotype is designated for A. impressus and a neotype for A. exiguus.
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              Traditional land use associated with swidden agriculture changes encounter rates of the top predator, the army ant, in Southeast Asian tropical rain forests

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                Author and article information

                Journal
                Journal of Hymenoptera Research
                JHR
                Pensoft Publishers
                1314-2607
                1070-9428
                March 20 2013
                March 20 2013
                : 31
                :
                : 165-233
                Article
                10.3897/jhr.31.4274
                © 2013
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