Multilocus phylogeny of Bornean Bent-Toed geckos (Gekkonidae: Cyrtodactylus) reveals hidden diversity, taxonomic disarray, and novel biogeographic patterns

Davis, Hayden R. and Chan, Kin Onn and Das, Indraneil and Brennan, Ian G. and Karin, Benjamin R. and Jackman, Todd R. and Brown, Rafe M. and Iskandar, Djoko T. and Nashriq, Izneil and Grismer, L. Lee and Bauer, Aaron M. (2020) Multilocus phylogeny of Bornean Bent-Toed geckos (Gekkonidae: Cyrtodactylus) reveals hidden diversity, taxonomic disarray, and novel biogeographic patterns. Molecular Phylogenetics and Evolution, 147. pp. 1-11. ISSN 1055-7903

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Multilocus phylogeny of Bornean Bent-Toed geckos (Gekkonidae Cyrtodactylus) reveals hidden diversity, taxonomic disarray, and novel biogeographic patterns.pdf

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The gekkonid genus Cyrtodactylus is a highly diverse group of lizards (280+ species), which covers an expansive geographic range. Although this genus has been the focus of many taxonomic and molecular systematic studies, species on the Southeast Asian island of Borneo have remained understudied, leading to an unclear evolutionary history with cascading effects on taxonomy and biogeographic inferences. We assembled the most comprehensive multilocus Bornean dataset (one mitochondrial and three nuclear loci) that included 129 novel sequences and representatives from each known Cyrtodactylus species on the island to validate taxonomic status, assess species diversity, and elucidate biogeographic patterns. Our results uncovered a high proportion of cryptic diversity and revealed numerous taxonomic complications, especially within the C. consobrinus, C. malayanus, and C. pubisulcus groups. Comparisons of pairwise genetic distances and a preliminary species delimitation analysis using the Automatic Barcode Gap Discovery (ABGD) method demonstrated that some wide-ranging species on Borneo likely comprise multiple distinct and deeply divergent lineages, each with more restricted distributional ranges. We also tested the prevailing biogeographic hypothesis of a single invasion from Borneo into the Philippines. Our analyses revealed that Philippine taxa were not monophyletic, but were likely derived from multiple separate invasions into the geopolitical areas comprising the Philippines. Although our investigation of Bornean Cyrtodactylus is the most comprehensive to-date, it highlights the need for expanded taxonomic sampling and suggests that our knowledge of the evolutionary history, systematics, and biogeography of Bornean Cyrtodactylus is far from complete.

Item Type: Article
Additional Information: 1. Agarwal, I., Mahony, S., Giri, V.B., Chaitanya, R., Bauer, A.M., 2018. Six new Cyrtodactylus (Squamata: Gekkonidae) from northeast India. Zootaxa 4524, 501–535. 2. Ahmad, N., Ahmad, E., Ratag, M., Sinon, E.A.A., Don, B., Francis, F., Mahmod, M.R., Agimin, A., Belabut, D., 2019. Amphibians and reptiles of imbak canyon study centre and batu timbang camp. J. Trop. Biol. Conserv. 25 33. 3. Alda, F., Tagliacollo, V.A., Bernt, M.J., Waltz, B.T., Ludt, W.B., Faircloth, B.C., Alfaro, M.E., Albert, J.S., Chakrabarty, P., 2019. Resolving deep nodes in an ancient radiation of Neotropical fishes in the presence of conflicting signals from incomplete lineage sorting. Syst. Biol. 68, 573–593. 4. Alexander, A.M., Su, Y.-C., Oliveros, C.H., Olson, K.V., Travers, S.L., Brown, R.M., 2017. Genomic data reveals potential for hybridization, introgression, and incomplete lineage sorting to confound phylogenetic relationships in an adaptive radiation of narrow-mouth frogs. Evolution 71, 475–488. 5. Aljanabi, S.M., Martinez, I., 1997. Universal and rapid salt-extraction of high quality genomic DNA for PCR-based techniques. Nucl. Acids Res. 25, 4692–4693.
Uncontrolled Keywords: Cryptic species, species delimitation, systematics, BioGeoBEARS, Ancestral range reconstruction, Sundaland, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history > QH426 Genetics
Q Science > QL Zoology
Q Science > QR Microbiology
Divisions: Academic Faculties, Institutes and Centres > Institute of Biodiversity and Environmental Conservation
Faculties, Institutes, Centres > Institute of Biodiversity and Environmental Conservation
Depositing User: Peter
Date Deposited: 15 Jul 2020 07:50
Last Modified: 23 Sep 2020 06:44

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