#subclass_Synapsida__Synapsida  extinct reptiles of the Permian to Jurassic considered ancestral to mammals
  supertype:  class__clas  (biology) a taxonomic group containing one or more orders
  member of:  class_Reptilia
  member:  order_Therapsida__Therapsida  extinct mammal-like reptiles found inhabiting all continents from the mid Permian to late Triassic
     member:  therapsid__protomammal  probably warm-blooded; considered direct ancestor of mammals
     member:  genus_Chronoperates__Chronoperates  a reptile genus of Therapsida
        member:  Chronoperates_paradoxus  shrew-sized protomammal from the Alberta Canada region; of about 55 million years ago (much more recent than other mammal-like reptiles)
     member:  division_Cynodontia__Cynodontia  a division of Triassic Therapsida comprising small carnivorous tetrapod reptiles often with mammal-like teeth
        member:  cynodont  small carnivorous reptiles
        member:  genus_Exaeretodon__Exaeretodon  a genus of reptiles of the division Cynodontia
     member:  division_Dicynodontia__Dicynodontia  a division of Therapsida
        member:  dicynodont  a kind of therapsid
        member:  genus_Ischigualastia__Ischigualastia  early reptile found in Argentina
  member:  order_Ictodosauria__Ictodosauria  extinct reptiles of the Upper Triassic
     member:  ictodosaur  intermediate in form between the therapsids and most primitive true mammals
  member:  order_Pelycosauria__Pelycosauria  edaphosaurus; dimetrodon
     member:  pelycosaur  large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America
     member:  family_Edaphosauridae__Edaphosauridae  a family of reptiles of the order Pelycosauria
        member:  genus_Edaphosaurus  type genus of the Edaphosauridae
           member:  edaphosaurus  heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic
     member:  genus_Dimetrodon  a reptile genus of Pelycosauria
        member:  dimetrodon  carnivorous dinosaur of the Permian in North America having a crest or dorsal sail

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