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Eumetazoa (metazoans)- 
    
Bilateria (bilaterally symmetrical animals)- 
    
Protostomia (protostomes)- 
    
    
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Arthropoda (arthropods)- 
    
Crustacea (shrimps, crabs, lobsters, water fleas, and relatives)- 
    
Class Maxillopoda- 
    
Order Calanoida- 
    
Family Calanidae- 
    
Genus Calanus- 
    
Species Calanus pacificus- 
        
Infraspecies Calanus pacificus californicus
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Infraspecies Calanus pacificus pacificus
 
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