The humerus, 88 millimetres long, has a low deltopectoral crest and no pneumatic foramen.
2.
It also presents a unique combination of anterior dorsal ribs with a pneumatic foramen and an ischium that is large in relation to the ilium.
3.
According to Rodrigues and Kellner the species has two unique traits : the presence of an oval depression above and in between the first pair of teeth and of a ventral medial depression between the second pair of teeth, a circular hollow positioned on the lower edge of the snout tip that Lee had interpreted as a possible pneumatic foramen.
4.
"Odontopteryx " differed from " Pelagornis " ( a contemporary of " Osteodontornis " ) and agreed with " Dasornis " in having a deep and long handward-pointing pneumatic foramen in the fossa pneumotricipitalis of the humerus, a latissimus dorsi muscle attachment site on the humerus that consists of two distinct segments instead of a single long, and a large knob that extends along the ulna where the ligamentum collaterale ventrale attached.
5.
Further traits in which " Dasornis " agreed with " Odontopteryx " & ndash; and differed from " Pelagornis " ( a contemporary of " Osteodontornis " ) are a deep and long handward-pointing pneumatic foramen in the fossa pneumotricipitalis of the humerus, a latissimus dorsi muscle attachment site on the humerus that consists of two distinct segments instead of a single long, and a large knob that extends along the ulna where the ligamentum collaterale ventrale attached.
6.
Although Larson ( 2013 ) saw Jane as more identical to CMNH 7541 and LACM 28471 than to adult " T . rex " in having a higher tooth count, large pneumatic foramen on the center of the quadratojugal, T-shaped postorbital, and fused shoulder blade and pelvis, Yun ( 2015 ) concurred with the opinion of most workers that " Nanotyrannus " is a juvenile " T . rex ", noting that a juvenile specimen of " Tarbosaurus " described by Tsuihiji et al . ( 2011 ) also has a T-shaped postorbital.
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