Publications by authors named "Hayden R Davis"
Article Synopsis
- This study examines species delimitation in a diverse gecko genus on Borneo, highlighting that mitochondrial DNA (mtDNA) can lead to an overestimation of species diversity.
- The researchers use genomic data to see if it provides a more accurate number of species compared to mtDNA and aim to explore species boundaries, species trees, and population connectivity.
- Findings indicate that genomic data reveals fewer true species and emphasizes the importance of using multi-locus data for clearer species classifications in groups with ambiguous boundaries.
Article Synopsis
- Understanding genetic diversity dynamics helps identify areas that impact gene flow, focusing on the Northern Alligator Lizard across diverse North American ecoregions.
- Genomic data from 120 lizards revealed at least 10 distinct populations, corresponding to known biogeographic patterns and highlighting barriers to gene flow in regions like the Sierra Nevada and Coastal Ranges.
- Findings support the idea of early population divergence in the Sierra Nevada and recent expansion into the Pacific Northwest, with genetic diversity being unevenly distributed and interconnected at the boundaries of these populations.
Article Synopsis
- Population dynamics and genetic structure of Western Fence Lizards (Sceloporus occidentalis) at the northern edge of their range around Puget Sound are influenced by recent post-glacial colonization and habitat requirements.
- The study utilized genome-wide SNPs and morphological data to reveal significant population differentiation, identifying 8-10 distinct subpopulations, while finding minimal morphological variation among them.
- Key factors contributing to population divergence include isolation, limited dispersal routes, and strict habitat needs, which may threaten their survival amid urbanization and habitat loss.
Three new species of Cnemaspis are described from karst regions of Sarawak, Malaysia, on the island of Borneo. These are Cnemaspis matahari sp. nov.
View Article and Find Full Text PDFThe 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.
View Article and Find Full Text PDFThe island of Borneo lies within one of the most biodiverse regions in the world. Despite this, its documented gekkonid diversity is not commensurate with other areas of Southeast Asia. The megadiverse genus Cyrtodactylus is especially underrepresented.
View Article and Find Full Text PDFThe Sundaic swamp clade of the genus Cyrtodactylus contains nine species that collectively range through Peninsular Malaysia and its associated land bridge islands, Singapore, Sumatra, Java, and Pulau Natuna Besar. Ancestral range reconstruction analyses using BioGeoBEARS based on an updated molecular phylogeny of the nine Sundaic swamp clade species of Cyrtodactylus demonstrated that this lineage evolved in Peninsular Malaysia, dispersed independently to Sumatra and Pulau Natuna Besar, Indonesia and most likely back into Peninsular Malaysia from Sumatra. This scenario is consistent with climate-driven, cyclical, ephemeral, geographic reconfigurations of Sundaic landmasses from at least the mid-Miocene to present.
View Article and Find Full Text PDFAn integrative taxonomic analysis is used to delimit and describe three new species of Pseudocalotoes from the sky island archipelago of the Banjaran (=mountain range) Titiwangsa of Peninsular Malaysia. Pseudocalotes drogon sp. nov.
View Article and Find Full Text PDFA new species of limestone cave-adapted gecko of the Cyrtodactylus pulchellus complex, C. hidupselamanya sp. nov.
View Article and Find Full Text PDFTwelve species of Ansonia occur on the Thai-Malay peninsula, of which, five from Peninsular Malaysia, form a monophyletic group. One of these, A. jeetsukumarani, is endemic to the Titiwangsa Mountain Range, in which, we discovered a new population of Ansonia that is not A.
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