Zelleriella opisthocarya Directory References Discover 7 of the World’s Most Dangerous Lizards and Turtles 7 Deadliest Weapons in History Cinco de Mayo What Is the Emoluments Clause? 11 of the World’s Most Famous Warplanes 6 Animals That Eat Their Mates Did Marie-Antoinette Really Say “Let Them Eat Cake”? Contents Ask the Chatbot a Question Zelleriella opisthocarya organism Ask the Chatbot a Question Learn about this topic in these articles:parasitism among protozoans In opalinidOne species, Zelleriella opisthocarya, is itself parasitized by another protozoan, Entamoeba paulista. Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.