Sequence alignment
Putative homologous protein sequences were aligned with MAFFT, using auto-parameterization (Nakamura et al. , 2018), and visualized in Jalview (Waterhouse et al. , 2009). Alignments were manually curated; partial sequences with substantial missing regions or anomalous insertions in conserved regions of the protein were removed to avoid confounding phylogenetic analyses and evolutionary model selection (Table S3). Protein sequence alignments were trimmed to the length of individual domains identified by NCBI’s conserved domains database (Supplementary Datafile S1). Each domain was then re-aligned.