title: Monogenetic trematodes from the Bay of Quinte area, Ontario. 3. Genera Actinocleidus, Cleidodiscus, Urocleidus, and Tetraoncus.
mesh_terms: D000818:Animals; D005399:Fishes; D009864:Ontario; D014200:Trematoda / Q000033:anatomy & histology / Q000145:classification*