Fig. 2
From: New insights into the first cervical vertebrae of Otavipithecus and Nacholapithecus

Methodological approach for capturing the dimensions of the atlas. Linear (a) and surface (b) measurements assessed in the atlas of GSN BA 104’91, KNM-BG 35250BE and of comparative specimens in superior view. AATh: anterior arch thickness; MDvD: maximum dorsoventral transverse diameter; MTrD: maximum transverse diameter; M10: canal dorsoventral maximum diameter; M11: canal transverse maximum diameter; PaTh: posterior arch thickness; STrD: superior transverse diameter; 1 L: diameter in major axis of the superior left articular facet; 2 L: diameter at a right angle to 1 L of the superior left articular facet; 1R: diameter in major axis of the superior right articular facet; 2R: diameter at a right angle to 1R of the superior right articular facet; 1 L/2L and 1R/2R: ratio between the diameter in the major axis and the orthogonal diameter. Figure generated with Adobe Photoshop CS5.