The phylogenetic relationships of Bivaginogyrus obscurus parasitising Pseudorasbora parva within Dactylogyridae. The phylogenetic tree is inferred from a Maximum Likelihood (ML) analysis of the 763 bp alignment of partial 28S rDNA sequences. Numbers along the branches represent Bayesian posterior probability/ML bootstrap support (only values > 0.70 for BI and > 50% for ML shown). Newly obtained sequences from the present study are in bold. Sequences of Dactylogyrus species parasitising P. parva are highlighted in grey. The branch length scale bar indicates the number of substitutions per site.