Boyer diss 2009 1046..

Boyer diss 2009 1046.. Boyer diss 2009 1046..

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Figure 4.11. Plesiadapis cookei (UM 87990). Stereophotographic views of the distal row of carpal bones. A, left trapezium; B, right trapezoid; and C, left hamate. 448

Figure 4.12. Surface reconstructions of the distal row of carpal bones of Plesiadapis cookei (UM 87990) based on HRxCT data [HRxCT resolution = 0.018 mm (cubic voxels)]. A, right trapezium and trapezoid. Articular surfaces are illustrated with gray shading and labeled with numbers: 1 – scaphoid facet, 2 – MC I facet, 3-3’ – corresponding facets of trapezoid and trapezium, 4 – MC II facet, and 5 – capitate and/or centrale facet. B1, scaphoid (Sc), trapezium (Trm), and trapezoid (Trd) articulated and oriented in several views with respect to idealized anatomical planes of the trapezium (i.e., as used in Fig. 4.11). B2, same bones as in “B1” articulated and oriented in several views with respect to idealized anatomical planes of the trapezoid (i.e., as used in Fig. 4.11). Note the wide separation between the facets for MC I and MC II. MC I and MC II did not contact one another in the articulated hand. 449

Figure 4.11. Plesiadapis cookei (UM 87990). Stereophotographic views of the distal row<br />

of carpal bones. A, left trapezium; B, right trapezoid; and C, left hamate.<br />

448

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