Fig. 1

Genome features of P. cordatum. a Distribution of repeat types in the P. cordatum genome. b Maximum likelihood tree inferred using 3507 strictly orthologous, single-copy protein sets among 31 dinoflagellate taxa, with ultrafast bootstrap support (based on 2000 replicate samples) shown at each internal node; unit of branch length is number of substitutions per site. The ecological niche for each taxon is shown on the right of the tree. The five representative taxa and P. cordatum from this study are highlighted on the tree in red text. Distribution of G+C content for c whole-genome sequences and d protein-coding sequences relative to the other five representative genomes. e Genome and gene features of P. cordatum relative to the other five taxa, showing haploid genome size estimated based on sequence data, number of protein-coding genes, intron lengths, and separately for introns that contain introner elements (IE⁺), and those that lack these elements (IE⁻), known repeat types, and types of duplicated genes