Fig. 3

Analysis of the cox1 combined fragment of Spirocerca spp. a A principal coordinate analysis (PCoA) scatter plot showing Nei’s genetic distances of the cox1 combined fragment sequences of S. lupi. b Bayesian inference tree of the cox1 combined fragment (317 to 1201 bp) of Spirocerca spp. Bootstrap and posterior probability values are shown above branches. c Haplotype network of the cox1 sequences. Each circle is colored according to the geographical origin of the haplotype; circle size is proportional to the number of sequences sharing the same haplotype. The black circles represent the number of mutations between the haplotypes