Median Joining haplotype network of the 18 S rRNA sequences (561 nucleotide positions) of Hepatozoon felis (A, B) and pie chart of the 18 S rRNA gene (572 nucleotide positions) of Hepatozoon silvestris (C, D) showing the geographical distribution (A, C) and the reported hosts (B, D). Circles represent haplotypes; numbers within the circles represent the number of individuals, if no number is shown, then only one individual is represented; labels next to circles specify organism name and representative GenBank accession numbers of the haplotypes, white circles represent intermediate nodes; bars on branches interconnecting haplotypes represent the number of substitutions; and asterisks mark haplotypes containing the individuals obtained in the present study.