#synapsid_reptile__synapsid  extinct reptile having a single pair of lateral temporal openings in the skull
  supertype:  reptile__reptilian  any cold-blooded vertebrate of the class Reptilia including tortoises turtles snakes lizards alligators crocodiles and extinct forms
  subtype:  therapsid__protomammal  probably warm-blooded; considered direct ancestor of mammals
     subtype:  Chronoperates_paradoxus  shrew-sized protomammal from the Alberta Canada region; of about 55 million years ago (much more recent than other mammal-like reptiles)
     subtype:  cynodont  small carnivorous reptiles
     subtype:  dicynodont  a kind of therapsid
  subtype:  ictodosaur  intermediate in form between the therapsids and most primitive true mammals
  subtype:  pelycosaur  large primitive reptile having a tall spinal sail; of the Permian or late Paleozoic in Europe and North America
  subtype:  edaphosaurus  heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic
  subtype:  dimetrodon  carnivorous dinosaur of the Permian in North America having a crest or dorsal sail

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