1. 
   Monogenea
   (from the article `flatworm`) The simplest cycle in parasitic platyhelminths occurs in the Monogenea, which have no intermediate hosts. The majority of the Monogenea are ... ...or pockets; protonephridia paired; testes usually numerous; penis papilla generally present; nervous system with 3–4 trun...
   Found op http://www.britannica.com/eb/a-z/m/113
   
   
2. 
   Monogenea
   Monogenea (adj. monogenean) are a group of largely ectoparasitic members of the flatworm phylum Platyhelminthes, class Monogenea. ==Characteristics== Monogenea are very small parasitic flatworms mainly found on skin or gills of fish. They are rarely longer than about 2 cm. A few species infecting c...
   Found op http://en.wikipedia.org/wiki/Monogenea
   
   
3. 
   Monogenea
   Monogenea is an order of Trematoda. They are ectoparasitic flukes with relatively simple life histories which do not involve an intermediate host. They feed on aquatic animals. Both hooks and suckers are present.
   Found op http://www.probertencyclopaedia.com/browse/BM.HTM
   
   

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