Bewildering biogeography: Waves of dispersal and diversification across southern Wallacea by bent-toed geckos (genus: Cyrtodactylus).

Autor: Reilly SB; Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA; Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95060, USA. Electronic address: sreilly@ucsc.edu., Stubbs AL; Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA., Karin BR; Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA., Arida E; Museum Zoologicum Bogoriense, Indonesian Institute of Sciences, Cibinong, Indonesia., Arifin U; Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA; School of Life Sciences and Technology, Institut Teknologi Bandung, 10 Jalan Ganesha, Bandung 40132, Indonesia., Hamidy A; Museum Zoologicum Bogoriense, Indonesian Institute of Sciences, Cibinong, Indonesia., Kaiser H; Department of Biology, 18422 Bear Valley Road, Victor Valley College, Victorville, California 92395, US, and Department of Vertebrate Zoology, Leibniz-Institut zur Analyse des Biodiversitätswandels, Museum Koenig, Adenauerallee 160, 53113 Bonn, Germany., Bi K; Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA; Computational Genomics Resource Laboratory, California Institute for Quantitative Biosciences, University of California, Berkeley, CA 94720, USA., Riyanto A; Museum Zoologicum Bogoriense, Indonesian Institute of Sciences, Cibinong, Indonesia., Iskandar DT; Basic Sciences Commission, Indonesian Academy of Sciences. 11, Jl. Medan Merdeka Selatan, Jakarta 10110, Indonesia; School of Life Sciences and Technology, Institut Teknologi Bandung, 10 Jalan Ganesha, Bandung 40132, Indonesia., McGuire JA; Museum of Vertebrate Zoology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA.
Jazyk: angličtina
Zdroj: Molecular phylogenetics and evolution [Mol Phylogenet Evol] 2023 Sep; Vol. 186, pp. 107853. Date of Electronic Publication: 2023 Jun 14.
DOI: 10.1016/j.ympev.2023.107853
Abstrakt: Bent-toed Geckos, genus Cyrtodactylus, are one of the most diverse terrestrial vertebrate groups, and their range extends from South Asia into Australo-Papua and adjacent Pacific islands. Given the generally high faunal endemism on Wallacean islands, it is rather paradoxical that the diversity in these geckos appears to be so low (21 species in Wallacea, 15 in the Philippines) compared with continental shelf assemblages (>300 species on Sunda + Sahul Shelves + adjacent islands). To determine whether this shortfall was real or an artifact of historical undersampling, we analyzed mitochondrial DNA sequences of hundreds of southern Wallacean samples (Lesser Sundas + southern Maluku). After screening to guide sample selection for target capture data collection, we obtained a 1150-locus genomic dataset (1,476,505 bp) for 119 samples of southern Wallacean and closely related lineages. The results suggest that species diversity of Cyrtodactylus in southern Wallacea is vastly underestimated, with phylogenomic and clustering analyses suggesting as many as 25 candidate species, in contrast to the 8 currently described. Gene exchange between adjacent candidate species is absent or minimal across the archipelago with only one case of > 0.5 migrants per generation. Biogeographical analysis suggests that the hitherto unrecognized diversity is the result of at least three independent dispersals from Sulawesi or its offshore islands into southern Wallacea between 6 and 14 Ma, with one invasion producing small-bodied geckos and the other two or three producing larger-bodied geckos. The smaller-bodied laevigatus group appears to be able to coexist with members of either larger-bodied clade, but we have yet to find members of the two larger-bodied clades occurring in sympatry, suggesting that ecological partitioning or competitive exclusion may be shaping individual island assemblages.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Author(s). Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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