Urokodia sheds light on the origin of chelicerae and book gills of Chelicerata - Nature

Data availabilityAll data analysed in this paper, including the phylogenetic datasets, are available as part of the Article, Extended Data Figs. 1–8 or the Supplementary Information. The original computed tomography images and phylogeny-related datasets (Supplementary Data 1–4) are accessible at Zenodo40 (https://doi.org/10.5281/zenodo.20156157).Code availabilityModifications to the previously published matrix16 are included in Supplementary Data 1. The phylogenetic datasets and commands necessary to run the MrBayes analyses are included as NEXUS formatted files (Supplementary Data 2–4). Phylogeny-related scripts (Supplementary Data 1–4) are accessible at Zenodo40 (https://doi.org/10.5281/zenodo.20156157).ReferencesSharma, P. P. & Gavish-Regev, E. The evolutionary biology of Chelicerata. Annu. Rev. Entomol. 70, 143–163 (2025).Article

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Legg, D. A., Sutton, M. D. & Edgecombe, G. D. Arthropod fossil data increase congruence of morphological and molecular phylogenies. Nat. Commun. 4, 2485 (2013).Article

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