- 
    
    
    
- 
    
Eumetazoa (metazoans)
- 
    
Bilateria (bilaterally symmetrical animals)
- 
    
Protostomia (protostomes)
- 
    
Platyhelminthes (flatworms)
- 
    
Class Trematoda
- 
    
Order Plagiorchiida
- 
    
Family Monorchiidae
- 
        
Genus Genolopa
 - 
        
Genus Hurleytrema
 - 
        
Genus Hurleytrematoides
 - 
        
Genus Lasiotocus
 - 
        
Genus Monorcheides
 - 
        
Genus Monorchis
 - 
        
Genus Postmonorchis
 - 
        
Genus Telolecithus
 
 - 
        
 
 - 
    
 
 - 
    
 
 - 
    
 
 - 
    
 
 - 
    
 
 - 
    
 
 -