Class Monogenea life cycle and Organs


Monogenetic flukes have only one generation in their life cycle. Thus one adult develops from one egg. Therefore, these animals are named as monogenetic. Monogeneans are mostly external parasites (ectoparasites) of freshwater and marine fishes. They attach to the gill filaments of host. They feed on epithelial cells, mucus or blood. They have a large posterior attachment organ called an opisthaptor. It helps in attachment. Adult monogeneans produce and release eggs. These eggs have one or more sticky threads. This thread attaches the eggs to the fish gill. A ciliated larva oncomiracidium hatches from the egg. It swims to another host fish and attaches to it opisthaptor. It finally develops into an adult.

Class Monogenea




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