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Eumetazoa (metazoans)- 
    
Bilateria (bilaterally symmetrical animals)- 
    
Protostomia (protostomes)- 
    
Platyhelminthes (flatworms)- 
    
Class Turbellaria- 
    
Order Polycladida- 
    
Family Hoploplanidae- 
    
Genus Hoploplana- 
        
Species Hoploplana californica
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Species Hoploplana grubei
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Species Hoploplana inquilina
 
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