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Comparison of phylogenies of different species within Diphyllobothrium based on cox1 and nad5 gene sequences. Two phylogenetic trees were constructed using the neighbor-joining distance method analysis with a Kimura-2-parameter model. The reliability of 2 trees was assessed using the bootstrap analysis with 1,000 replicates. The triangles indicate the sequences of Diphyllobothrium from the present study.
