APPENDIX 2 VIDEO OF SKULL CT-MODEL WITH SUTURES
A three dimensional computer model of a Sphenodon skull which shows that the soft tissue component of cranial joints (pink) occupies a complex ribbon-like volume. MicroCT slices of specimen YPM9194 (skull length = 48.75 mm) were viewed in the software programme VG studio max (Volume Graphics GmbH, Heidelberg, Germany). Bone was selected using the thresholding tool whereas sutures were manually segmented slice by slice in the x, y, and z planes. This work was carried out under the supervision of Dr. Jessie Maisano, at the High-Resolution X-ray Computed Tomography Facility, University of Texas, Austin, USA.