Figure 1From: Analysis of Schistosoma mansoni genes shared with Deuterostomia and with possible roles in host interactionsSchematic representation of the two main hypotheses for the relationships between animal phyla. A – Acoelomata-Pseudocoelomata-Coelomata hypothesis; B – Lophotrocozoa-Ecdysozoa-Deuterostomia hypothesis. This scheme is illustrative and branch lengths do not reflect evolutionary distances.Back to article page