Figure 2

Cranial view of the koala humerus produced by 3D reconstruction of the micro-CT scan using Slicer version 4.10.2. Left of the image is lateral. Blue line indicates humeral length. Red lines indicate each measurement level of the humerus. 1 = between tuberosities; 2 = proximal third; 3 = deltoid ridge; 4 = distal third; 5 = between epicondyles. Identifying landmarks are also identified. Where h = humeral head; t = greater tuberosity; t’ = lesser tuberosity; dr = deltoid ridge; sr = supinator ridge; cf = supracondylar foramen; ec = external epicondyle; ic = internal epicondyle; ar = articular surface (radius); au = articular surface (ulna). Also included are the transverse slices of each measurement level with lateral on the left and cranial at the bottom of each image.