Figure 1. Distribution of sampling sites of polychaete assemblages.

Numbers identify geographic regions (1, Alaska; 2, Canada-Maine; 3, Argentina; 4, Venezuela; 5, Colombia; 6, Brazil; 7, South Africa; 8, Philippines; 9, Japan). Several of the locations of individual sites within a region are superimposed on each other and cannot be distinguished at this scale (e.g. sites at the border between Canada and Maine). See supplementary Table S1 for further details.