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Publication - Dr Jakob Vinther

    Increasing species sampling in genomic-scale datasets provides molecular support for the monophyly of Acari and Arachnida

    Citation

    Lozano-Fernandez, J, Tanner, A, Giacomelli, M, Carton, R, Vinther, J, Edgecombe, GD & Pisani, D, 2019, ‘Increasing species sampling in genomic-scale datasets provides molecular support for the monophyly of Acari and Arachnida’. Nature Communications.

    Abstract

    Chelicerates are a diverse group of arthropods, represented by such forms as predatory spiders and scorpions, eusocial mites, parasitic ticks, humic detritivores, as well as the marine sea spiders (pycnogonids) and horseshoe crabs. Conflicting phylogenetic relationships have been proposed for chelicerates based on both morphological and molecular data, the latter usually not recovering arachnids as a clade. Using genomic-scale datasets and analyses optimised to attempt countering systematic error, we found the first molecular support for monophyletic Acari (ticks and mites), which when considered together represent the most biodiverse chelicerate lineage. In addition, the dataset that minimises saturation and maximises slow-evolving genes recovers marine forms as the sister group of a monophyletic lineage of terrestrial arachnids, suggesting a single colonisation of land within Chelicerata.

    Full details in the University publications repository