As of 2014, the "most comprehensive phylogenomic analysis of syndermatan relationships" to date was based on transcriptome data from all four groups, and provided "strong support" for the hypothesis illustrated in the bottom left of the figure, in which Seisonidea and Acanthocephala are sister taxa.
En 2014, a "análise filoxenómica máis completa das relacións dos sindermatas" feita ata agora estaba baseada en datos do transcritoma dos catro grupos, e proporcionou un "forte apoio" á hipótese ilustrada abaixo á esquerda da figura, na cal Seisonidea e Acanthocephala son taxons irmáns.