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Phylogenetic tree of 28S rDNA D1 gene by maximum parsimony (MP) analysis using the PAUP 4.0 program. Nucleotide sequences were used to construct this tree. Sequences from Gastrocotyle trachuri (GenBank accession No.: AF131727) were employed as an outgroup for phylogenetic analysis. Above branch: MP bootstrap values, below branch: NJ bootstrap values, when 1,000 bootstrap replicates where ≥ 50%, respectively.
