- 
    
    
    - 
    
Eumetazoa (metazoans)- 
    
Bilateria (bilaterally symmetrical animals)- 
    
Protostomia (protostomes)- 
    
    
    - 
    
Arthropoda (arthropods)- 
    
Chelicerata (spiders, mites, scorpions, and relatives)- 
    
Class Arachnida- 
    
Order Not assigned- 
    
Superfamily Chthonioidea- 
    
Family Chthoniidae- 
    
Genus Kleptochthonius- 
        
Species Kleptochthonius affinis
- 
        
Species Kleptochthonius anophthalmus
- 
        
Species Kleptochthonius attenuatus
- 
        
Species Kleptochthonius barri
- 
        
Species Kleptochthonius binoculatus
- 
        
Species Kleptochthonius cerberus
- 
        
Species Kleptochthonius charon
- 
        
Species Kleptochthonius crosbyi
- 
        
Species Kleptochthonius daemonius
- 
        
Species Kleptochthonius erebicus
- 
        
Species Kleptochthonius geophilus
- 
        
Species Kleptochthonius gertschi
- 
        
Species Kleptochthonius griseomanus
- 
        
Species Kleptochthonius hageni
- 
        
Species Kleptochthonius henroti
- 
        
Species Kleptochthonius hetricki
- 
        
Species Kleptochthonius hubrichti
- 
        
Species Kleptochthonius infernalis
- 
        
Species Kleptochthonius inusitatus
- 
        
Species Kleptochthonius krekeleri
- 
        
Species Kleptochthonius lewisorum
- 
        
Species Kleptochthonius lutzi
- 
        
Species Kleptochthonius magnus
- 
        
Species Kleptochthonius microphthalmus
- 
        
Species Kleptochthonius multispinosus
- 
        
Species Kleptochthonius myopius
- 
        
Species Kleptochthonius oregonus
- 
        
Species Kleptochthonius orpheus
- 
        
Species Kleptochthonius packardi
- 
        
Species Kleptochthonius pluto
- 
        
Species Kleptochthonius polychaetus
- 
        
Species Kleptochthonius proserpinae
- 
        
Species Kleptochthonius proximosetus
- 
        
Species Kleptochthonius regulus
- 
        
Species Kleptochthonius rex
- 
        
Species Kleptochthonius sheari
- 
        
Species Kleptochthonius similis
- 
        
Species Kleptochthonius stygius
- 
        
Species Kleptochthonius tantalus
 
- 
        
 
- 
    
 
- 
    
 
- 
    
 
- 
    
 
- 
    
 
- 
    
 
- 
    
 
- 
    
    
    
 
- 
    
 
- 
    
 
- 
    
