Whole-genome DNA-seq and strand-specific RNA-seq on 18 species, including 14 metazoans and four unicellular eukaryotes closely related to metazoans. For each species, two to three (mostly three) specimens were sequenced to serve as biological replicates. For each specimen, we collected matching DNA-seq and RNA-seq data to control false positives resulted from genetic SNP during RNA-editing site identification.