Description: "Opisthaptor: bearing one pair of hooks. Eyes: present or absent. Reproductive systems: testes numerous, confined to the region between the caeca. Ovary in front of the testes. Uterus short, in front of the overy. Vaginae present. Parasites in the urinary of batrachians."
Source: The Trematoda: With Special Reference to British and Other European Forms p. 148