Figure 4. Single most parsimonious tree based on combined 18S rDNA, 28s rDNA, 12s rDNA, and COI datasets.

The family Praobdellidae formed a well-supported monophyletic group of leeches that exhibits a predilection for mammalian mucosa. All groups received 100 percent bootstrap support and posterior probabilities of 1.00 except as noted on the tree. Branches are drawn proportional to amount of change.