Fig. 6: O. frankpressi has a reduced innate immune gene repertoire compared to Vestimentifera.

Heatmaps of tissue-specific normalised gene expression of innate immune genes in four species of Siboglinidae, including O. frankpressi (top) and the Vestimentifera Oasisia alvinae, R. pachyptila and P. echinospica. While Vestimentifera have relatively similar repertoires of innate immune genes, O. frankpressi has a much-reduced complement (Supplementary Table 7). Notably, innate immune genes do not show a clear tissue-specific expression within or among species of Siboglinidae. The immune repertoire and gene expression values for P. echinospica and L. luymesi is based on previously published genome resources8, 9. Source data for O. frankpressi, Oasisia alvinae and R. pachyptila are provided as a Source Data file.