Supplementary material S1 - Table S1 Specimen numbers, taxonomic authorities, and institutional abbreviations. Supplementary material S2 Landmark coordinates of all taxa included in the study (.nts fo
Polycomb group (PcG) genes are chromatin modifiers that mediate epigenetic silencing of target genes. PcG-mediated epigenetic silencing is implicated in embryonic development, stem cell plasticity, ce