Phylogenetic tree for selected members of the Sarcocystidae based on 28S rRNA sequences and inferred by the maximum parsimony (MP) method using the Tree-Bisection-Regrafting (TBR) algorithm. The analysis involved 20 nucleotide sequences (GenBank accession numbers behind the taxon names), and a total of 4,517 positions in the final dataset. The values between the branches represent percent bootstrap value per 1,000 replicates, and the values below 50% are not shown. The four new sequences of Sarcocystis tenella (MF039325 and MF039326) and S. arieticanis (MF039327 and MF039328) have the taxon name in boldface.