Figure 3. Conserved macro synteny signal between S. maritima and the chordate lancelet B. floridae clustered into ancestral linkage groups.

Each dot represents a pair of genes, one in B. floridae, one in S. maritima, assigned to the same gene family by our orthology analysis. The ancestral linkage group identifiers refer to groups of scaffolds from the S. maritima (SmALG) or B. floridae (BfALG) assemblies, as detailed in File S2. The identification of ALGs is described in the SI. Note that two S. maritima scaffolds were divided across ALGs, and so appear multiple times in File S2.