Reappraisal of patterns of nonmarine cryptodiran turtle carotid circulation: Evidence from osteological correlates and soft tissues
Article first published online: 16 APR 2007
Copyright © 2007 Wiley-Liss, Inc.
Journal of Morphology
Volume 268, Issue 7, pages 571–587, July 2007
How to Cite
Jamniczky, H. A. and Russell, A. P. (2007), Reappraisal of patterns of nonmarine cryptodiran turtle carotid circulation: Evidence from osteological correlates and soft tissues. J. Morphol., 268: 571–587. doi: 10.1002/jmor.10539
- Issue published online: 8 JUN 2007
- Article first published online: 16 APR 2007
- Natural Sciences and Engineering Research Council of Canada
- Alberta Ingenuity Fund
- Society of Vertebrate Paleontology
- Chelonian Research Foundation
- University of Calgary
- computed tomography;
The turtle cranial circulation has been employed as an important source of phylogenetic information, but recent conflicting hypotheses of relationship within Testudinata suggest reevaluation of the utility of characters drawn from this complex. As a component ofa comprehensive character analysis, the osteological correlatesof the nonmarine cryptodiran turtle carotid circulation are herein subjected to high-resolution X-ray computed tomography, reassessed, and statistically investigated. Three different patterns of osteological correlates, indicating three disparate cranial circulatory patterns, are described, and this finding is corroborated by evidence from circulatory soft tissues. Members of the Trionychia and Kinosternoidea exhibit patterns that differ from the more widespread condition found in testudinoid taxa. This result differs from previous work, which has indicated the presence of only two major cranial circulatory patterns, and suggests that while cranial circulatory features may be phylogenetically informative, the information contained within them indicates patterns of relationship different from those previously hypothesized. J. Morphol., 2007. © 2007 Wiley-Liss, Inc.