#rib.anatomical_structure  a riblike supporting or strengthening part of an animal or plant
  supertype:  #anatomical_structure__structure__complex_body_part__bodily_structure__body_structure  a particular complex anatomical structure; "he has good bone structure"
  subtype:  #quill.rib__calamus__shaft  the hollow shaft of a feather
  subtype:  #vein.rib__nervure  one of the horny ribs that stiffen and support the wing of an insect
  subtype:  #nervure__vein  one of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ
     subtype:  #midrib  the vein in the center of a leaf

No statement uses or specializes #rib.anatomical_structure; click here to add one.