#subclass_Archaeornithes__Archaeornithes  primitive reptile-like fossil birds of the Jurassic or early Cretaceous
  supertype:  class__clas  (biology) a taxonomic group containing one or more orders
  member of:  class_Aves
  member:  genus_Archaeopteryx__genus_Archeopteryx  a genus of fossil birds
     member:  archaeopteryx__archeopteryx__Archaeopteryx_lithographica  extinct primitive toothed bird of the Upper Jurassic having a long feathered tail and hollow bones; usually considered the most primitive of all birds
  member:  genus_Sinornis  a genus of fossil birds
     member:  Sinornis  sparrow-sized fossil bird of the Upper Jurassic to Lower Cretaceous having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds
  member:  genus_Ibero-mesornis  a genus of fossil bird of the subclass Archaeornithes
     member:  Ibero-mesornis  sparrow-sized fossil bird of the Lower Cretaceous having a vestigial tail; found in Spain; considered possibly the third most primitive of all birds
  member:  genus_Archaeornis  a genus of fossil bird
     member:  archaeornis__archaeorni  extinct primitive toothed bird with a long feathered tail and three free clawed digits on each wing

No statement uses or specializes subclass_Archaeornithes; click here to add one.