Assertion: lizard's skull | /r/HasAspect | two pairs of arches
Facets:
value: of a middle ear
type: LOCATION
Source sentences:
text: Although it superficially resembles a lizard, the tuatara has a number of features which clearly distinguish it: the structure of the skull, which has two pairs of arches like a crocodilian's; the vertebrae, which are hollow at each end; a small projection on the back of each rib (the uncinate process); a bony skeleton in the abdominal wall; the jaw teeth, which are not separate structures but serrations of the jaw bone; the absence of an ear drum (tympanum) and of a middle ear, and the absence of a male copulatory organ.