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Eumetazoa (metazoans)- 
    
Bilateria (bilaterally symmetrical animals)- 
    
Protostomia (protostomes)- 
    
    
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Mollusca (clams, snails, squids, and relatives)- 
    
Class Gastropoda- 
    
Order Heterostropha- 
    
Family Pyramidellidae- 
        
Genus Agatha
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Genus Besla
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Genus Boonea
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Genus Branchyostomia
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Genus Careliopsis
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Genus Chemnitzia
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Genus Chrysallida
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Genus Cingulina
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Genus Cyclostremella
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Genus Epigrus
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Genus Eulimastoma
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Genus Eulimella
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Genus Evalea
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Genus Fargoa
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Genus Gumina
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Genus Herviera
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Genus Hinemoa
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Genus Houbricka
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Genus Ividella
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Genus Ividia
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Genus Kleinella
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Genus Koloonella
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Genus Linopyrga
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Genus Liostomia
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Genus Menestho
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Genus Milda
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Genus Miralda
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Genus Obexomia
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Genus Odostomella
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Genus Odostomia
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Genus Orinella
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Genus Otopleura
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Genus Peristichia
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Genus Petitilla
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Genus Planpyrgiscus
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Genus Pseudoscilla
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Genus Puposyrnola
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Genus Pyramidella
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Genus Pyrgiscilla
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Genus Pyrgulina
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Genus Rissopsetia
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Genus Sayella
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Genus Siogamaia
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Genus Striarcana
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Genus Striodostomia
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Genus Syrnola
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Genus Terelimella
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Genus Trabecula
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Genus Triptychus
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Genus Turbonilla
 
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