Definition: Proteonematalycidae is a family of nematodes, which belong to the order Nematoda in the class Platyhelminthes, and are characterized by their small size (less than 10 micrometers), large body size (up to 25 millimeters) and the presence of two ciliated flagella. They are also known for their ability to invade and colonize various host tissues, including skin, mucous membranes, and organs, where
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