3D morphology of the Cambrian bivalved arthropod Sunella informs about head segmentation, arthrodization, and arthropodization

The measurement data for Sunella valves is included as EXCEL formatted file (Supplementary Data 1). The phylogenetic datasets necessary to run the MrBayes analyses, are included as EXCEL formatted file (Supplementary Data 2). The datasets necessary to run the convergence of Bayesian analysis are included as P formatted files (Supplementary Data 3). The datasets and the commands necessary to run the Ancestral state reconstruction analyses, are included as R formatted files (Supplementary Data 4, 5). The datasets and the commands necessary to run the Elliptical fourier analyses and linear discriminant analysis, are included as R formatted file (Supplementary Data 6). The outline of the Sunella valve from EFA analysis is provided as a JPG formatted file (Supplementary Data 6).