Abstract
Ozobranchidae Pinto, 1921, one of the first leech families to diverge within Hirudinea, includes two marine genera (Ozobranchus and Bogabdella) and one exclusively freshwater genus (Unoculubranchiobdella), a total of eleven species parasitic on chelonians. Ozobranchus species are found in sea turtles (Chelonia mydas and Caretta caretta) on the Brazilian coast and are often associated wit…