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Eumetazoa (metazoans)- 
    
Bilateria (bilaterally symmetrical animals)- 
    
Protostomia (protostomes)- 
    
Platyhelminthes (flatworms)- 
    
Class Turbellaria- 
    
Order Polycladida- 
    
Family Pericelidae- 
    
Genus Pericelis- 
        
Species Pericelis byerleyana
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Species Pericelis cata
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Species Pericelis ernesti
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Species Pericelis hymanae
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Species Pericelis leyana
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Species Pericelis orbicularis
 
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