Table 2. Selected measurements (in mm) of the axial, pectoral girdle and forelimb of the YPM-PU 22400 perinatal specimens of Maiasaura peeblesorum.

Scapular and humeral measurements are taken from the most complete scapula (Fig. 7C) and humerus (Figs. 8C and 8D), respectively. Forerarm and manual measurements are from the articulated forearm and hand shown in Figs. 9E and 9F. All other pectoral and forelimb elements are of similar size to those measured below.

Element	Measurement
Sternal plate, length of preserved fragment	30
Sternal plate, minimum width of caudolateral process	10
Coracoid, length from the cranial end of the scapular facet to apex of ventral process (parallel to lateral margin of glenoid facet)	20.7
Coraoid, width from lateral margin of biceps tubercle to lateral margin of glenoid facet	15.1
Coracoid, length of glenoid facet	8.5
Coracoid, length of scapular facet	8.2
Scapula, length (parallel to dorsal margin) from cranial end of pseudoacromion process to incomplete distal end of scapular blade	66.5
Scapula, minimum width of proximal constriction	13.2
Scapula, maximum width of incomplete distal end of scapular blade	18.4
Humerus, length from dorsal margin of articular head to radial condyle	76.3
Humerus, length of deltopectoral crest	31.2
Humerus, maximum width from caudal margin to lateral margin of deltopectoral crest	15.4
Humerus, minimum diameter of shaft	8.7
Humerus, width of proximal margin	15.8
Humerus, width across distal condyles	16.6
Ulna, length	75.2
Ulna, mimimum diameter of shaft	5.6
Ulna, maximum depth of proximal end	11.3
Radius, length	71.6
Radius, mimimum diameter of shaft	4.5
Metacarpal III, length	35.5
Metacarpal IV, length	34.7
Metacarpal V, length	11.3
Phalanx III-1, length	10.2
Phalanx IV-1, length	10.4
Phalanx V-1, length	7.9