Biota (Life)
    
        Eukaryote (Eukarya)
    
        Podiata
    
        Unikont (Unikonta)
    
        Opisthokont (Opisthokonta)
    
        Holozoa
    
        Filozoa
    
        Apoikozoa (Choanozoa)
    
        Animal (Animalia)
    
        Metazoa
    
        Epitheliozoa
    
        Eumetazoa
    
        Bilateria
    
        Nephrozoa (Eubilateria)
    
        Protostome (Protostomia)
    
        Chaetognatha (Arrow worms)
    
        Sagittoidea
    
        Phragmophora
    
        Spadellidae
    
    Calispadella (4753935)
    
    
    
        
        Children (1 direct children, 1 direct and indirect children):
        
        
        
            
                Calispadella alata