leech
Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodie ...
found in North America. Leeches are habitual ectoparasites of vertebrates in aquatic environments. ''Placobdella parasitica'' is differentiated from other members of the genus ''
Placobdella
''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker.