Cranial osteology of a juvenile specimen of Tarbosaurus bataar from ...

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Downloaded By: [Society of Vertebrate Paleontology] At: 14:24 10 May 2011 TSUIHIJI ET AL.—SKULL OF A JUVENILE TARBOSAURUS 501 FIGURE 4. Surface rendering images of the skull of a juvenile Tarbosaurus bataar (MPC-D 107/7) based on the CT data with the matrix digitally removed. A, left lateral view; B, right lateral view. Bones that are largely concealed within matrix in Figures 2 and 3 are identified in this figure. (Figure appears in color online.).
Downloaded By: [Society of Vertebrate Paleontology] At: 14:24 10 May 2011 502 JOURNAL OF VERTEBRATE PALEONTOLOGY, VOL. 31, NO. 3, 2011 FIGURE 5. Skull of a juvenile Tarbosaurus bataar (MPC-D 107/7). A and B, photograph and interpretative drawing, respectively, in dorsal view; C and D, photograph and volume rendering image based on the CT data, respectively, in caudal view; E and F, close-up of the frontal and parietal (E) in comparison with those of a larger individual (MPC-D 107/14, F) in dorsal view. The arrow in E indicates a mushroom-like rostral process of the parietal invading between the right and left frontals. Arrowheads in E and F indicate rostral margins of the supratemporal fossae. bones of at least three individuals of varying sizes. These individuals probably belong to large juveniles or young adults and are much smaller than MPC-D 107/2. Computed Tomography Scan—In order to supplement observations on the external surface, the present specimen was subjected to X-ray computed tomographic (CT) imaging. It was scanned helically on a General Electric LightSpeed Ultra Multi- Slice CT scanner at O’Bleness Memorial Hospital, Athens, Ohio, with a slice thickness of 625 µm at 120 kV and 200 mA. Observations on image slices and three-dimensional (3D) visualization were done using the software package Amira 4.1.2 (Visage Imaging Inc., Chelmsford, MA).
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Cranial osteology of a juvenile specimen of Tarbosaurus bataar from ...

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