Fig. 1

Geographic distribution and phylogenetic relationships of Mesorhabditis species. Sexual species are shown in black. Asexual species are color coded as in panel B. a The geographic origin of strains (as listed in Table S1) is shown as colored dots on a world map (under Creative Commons license), with an inset showing their distribution in Europe. b The phylogenetic relationships were deduced from analysis of 28S and ITS2 rDNA sequences. Only those bootstrap values (100 replicates) higher than 95 are shown. The male tail morphology of species, classified as short or long tail, is shown as schematic drawings