Alphadontidae was a family of mammals belonging to the clade Metatheria, the group of mammals that includes modern-day marsupials.
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- Allqokirus
 
- Argyrolestes
 
- Hondadelphys
 
- Nemolestes
 
- Patene
 
- Procladosictis
 
- Stylocynus
  
  |  | Hathliacynidae | 
- Acyon
 
- Australogale
 
- Borhyaenidium
 
- Chasicostylus
 
- Cladosictis
 
- Notictis
 
- Notocynus
 
- Notogale
 
- Perathereutes
 
- Pseudonotictis
 
- Sallacyon
 
- Sipalocyon
  
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 | Borhyaenoidea |  | 
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- Apeirodon?
 
- Bobbschaefferia
 
- Caroloameghinia
 
- Carolocoutoia
 
- Guggenheimia
 
- Gashternia
 
- Hatcheritherium
 
- Palangania
 
- Procaroloameghinia
 
- Protodidelphis
 
- Pujatodon?
 
- Reigia
 
- Robertbutleria
 
- Wamradolops
 
- Zeusdelphys
  
  |  | Bonapartheriiformes | | Bonapartheriidae |  | 
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 | Argyrolagidae |  | 
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 | Chulpasiinae |  | 
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 | Prepidolopidae | 
- Incadolops
 
- Perrodelphys
 
- Prepidolops
 
- Punadolops
 
- Seumandia
  
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 | Rosendolopidae |  | 
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 | Polydolopiformes | | Polydolopidae | 
- Amphidolops
 
- Antarctodolops
 
- Eudolops
 
- Eurydolops
 
- Hypodolops
 
- Kramadolops
 
- Parabderites
 
- Polydolops
 
- Pseudolops
  
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 | Sillustaniidae | 
- Roberthoffstetteria
 
- Sillustania
  
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Taxon identifiers  | 
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| Alphadontidae |  | 
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