#keel.carina  the median ridge on the breastbone of birds that fly
  supertype:  #carina  any of various keel-shaped structures or ridges such as that on the breastbone of a bird or that formed by the fused petals of a pea blossom
  part of:  #carinate_bird__carinate__flying_bird  birds having keeled breastbones for attachment of flight muscles

No statement uses or specializes #keel.carina; click here to add one.