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An ant genus-group (Prenolepis) illuminates the biogeography and drivers of insect diversification in the Indo-Pacific

P. Matos-Maraví, RM. Clouse, EM. Sarnat, EP. Economo, JS. LaPolla, M. Borovanska, C. Rabeling, J. Czekanski-Moir, F. Latumahina, EO. Wilson, M. Janda,

. 2018 ; 123 (-) : 16-25. [pub] 20180213

Language English Country United States

Document type Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.

Persistent link   https://www.medvik.cz/link/bmc19000917

The Malay Archipelago and the tropical South Pacific (hereafter the Indo-Pacific region) are considered biodiversity hotspots, yet a general understanding of the origins and diversification of species-rich groups in the region remains elusive. We aimed to test hypotheses for the evolutionary processes driving insect species diversity in the Indo-Pacific using a higher-level and comprehensive phylogenetic hypothesis for an ant clade consisting of seven genera. We estimated divergence times and reconstructed the biogeographical history of ant species in the Prenolepis genus-group (Formicidae: Formicinae: Lasiini). We used a fossil-calibrated phylogeny to infer ancestral geographical ranges utilizing a biogeographic model that includes founder-event speciation. Ancestral state reconstructions of the ants' ecological preferences, and diversification rates were estimated for selected Indo-Pacific clades. Overall, we report that faunal interchange between Asia and Australia has occurred since at least 20-25 Ma, and early dispersal to the Fijian Basin happened during the early and mid-Miocene (ca. 10-20 Ma). Differences in diversification rates across Indo-Pacific clades may be related to ecological preference breadth, which in turn may have facilitated geographical range expansions. Ancient dispersal routes suggested by our results agree with the palaeogeography of the region. For this particular group of ants, the rapid orogenesis in New Guinea and possibly subsequent ecological shifts may have promoted their rapid diversification and widespread distribution across the Indo-Pacific.

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$a Matos-Maraví, Pável $u Institute of Entomology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Department of Zoology, Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech Republic; Department of Biological and Environmental Sciences, University of Gothenburg, Göteborg, Sweden; The Gothenburg Global Biodiversity Centre, Göteborg, Sweden. Electronic address: pavelm14@gmail.com.
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$a The Malay Archipelago and the tropical South Pacific (hereafter the Indo-Pacific region) are considered biodiversity hotspots, yet a general understanding of the origins and diversification of species-rich groups in the region remains elusive. We aimed to test hypotheses for the evolutionary processes driving insect species diversity in the Indo-Pacific using a higher-level and comprehensive phylogenetic hypothesis for an ant clade consisting of seven genera. We estimated divergence times and reconstructed the biogeographical history of ant species in the Prenolepis genus-group (Formicidae: Formicinae: Lasiini). We used a fossil-calibrated phylogeny to infer ancestral geographical ranges utilizing a biogeographic model that includes founder-event speciation. Ancestral state reconstructions of the ants' ecological preferences, and diversification rates were estimated for selected Indo-Pacific clades. Overall, we report that faunal interchange between Asia and Australia has occurred since at least 20-25 Ma, and early dispersal to the Fijian Basin happened during the early and mid-Miocene (ca. 10-20 Ma). Differences in diversification rates across Indo-Pacific clades may be related to ecological preference breadth, which in turn may have facilitated geographical range expansions. Ancient dispersal routes suggested by our results agree with the palaeogeography of the region. For this particular group of ants, the rapid orogenesis in New Guinea and possibly subsequent ecological shifts may have promoted their rapid diversification and widespread distribution across the Indo-Pacific.
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$a Clouse, Ronald M $u Division of Invertebrate Zoology, American Museum of Natural History, New York City, NY, USA.
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$a Sarnat, Eli M $u Department of Entomology, University of Illinois, IL, USA.
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$a Economo, Evan P $u Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan.
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$a Borovanska, Michaela $u Institute of Entomology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic.
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$a Rabeling, Christian $u School of Life Sciences, Arizona State University, Tempe, AZ, USA; Museum of Comparative Zoology, Harvard University, Cambridge, MA, USA.
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$a Czekanski-Moir, Jesse $u Department of Environmental and Forest Biology, 1 Forestry Drive, State University of New York, Syracuse, NY, USA.
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$a Latumahina, Fransina $u Department of Forestry, Agriculture Faculty, Pattimura University, Ambon, Indonesia.
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$a Wilson, Edward O $u Museum of Comparative Zoology, Harvard University, Cambridge, MA, USA.
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$a Janda, Milan $u Institute of Entomology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech Republic; Cátedras CONACYT, Laboratorio Nacional de Análisis y Síntesis Ecológica, ENES, UNAM, Morelia, Mexico.
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