The Scorpions (Scorpiones) - order
(Pseudochactida) - parvorder
(Pseudochactoidea) - superfamily

(Pseudochactidae)
- family
(Buthida) - parvorder
(Buthoidea) - superfamily

(Buthidae)
- family

(Microcharmidae)
- family
(Chaerilida) - parvorder
(Chaeriloidea) - superfamily

(Chaerilidae)
- family
(Iurida) - parvorder
(Chactoidea) - superfamily

(Chactidae)
- family

(Euscorpiidae)
- family

(Superstitioniidae)
- family

(Vaejovidae)
- family
(Iuroidea) - superfamily

(Caraboctonidae)
- family

(Iuridae)
- family
(Scorpionoidea) - superfamily

(Bothriuridae)
- family

(Hemiscorpiidae)
- family

(Scorpionidae)
- family