Bowling Green State University
Steiner, Alexis K.
3D Digitization and Wear Analysis of Sauropod Teeth.
Degree: MS, Geology, 2018, Bowling Green State University
Sauropods have been one of the most studied dinosaur
groups due to their extremely large body size. An open question is
what these animals ate to reach such gargantuan sizes. The diets of
fossil vertebrates can be determined by examination of microscopic
wear patterns on the surface of the teeth, which can distinguish
between hard and soft foods and constrain the feeding height and
food selectivity of the animal. This study examined the microwear
patterns on ten Late Jurassic sauropod teeth from the Morrison
Formation of North America, including the diplodocids
<i>Barosaurus</i>, <i>Diplodocus</i>, and
<i>Suuwassea</i> and the macronarian
<i>Camarasaurus</i>, using scanning electron microscopy
(SEM). In addition, the capability of a three-dimensional laser
scanner, a less expensive and potentially less damaging method than
SEM, to image these microwear patterns was tested. The SEM images
were analyzed for wear patterns, before they were marked on the
images and the lengths and widths of the wear was measured. The 3D
images were also examined to test if microscopic wear could be seen
on the models. The 3D scans proved too coarse to view microscopic
detail while only scratches were found on six of the ten teeth
tested. No wear was found on the <i>Barosaurus</i>
teeth tested. From this information it was concluded that both
<i>Suuwassea</i> and <i>Camarasaurus</i>
fit with previous studies indicating both were more selective,
mid-height browsers while the single <i>Diplodocus</i>
tooth tested did not match the previous study which indicated the
animal should be a low level non-selective browser due to the lack
of pitting visible on the wear surface. The laser scanner proved
unable to create images fine enough to see the microscopic wear on
the teeth, which indicates that while still a valuable tool in
other circumstances, the 3D scanner has not reached a point where
it can completely replace the older SEM method.
Advisors/Committee Members: Yacobucci, Dr. Margaret (Advisor).
Subjects/Keywords: Biology; Geology; Paleontology; Sauropod; wear analysis; microwear; dinosaur; 3D scanning; digitization; teeth; SEM; scanning electron microscope; Late Jurassic; Morrison Formation; feeding style; Barosaurus; Diplodocus; Suuwassea; Camarasaurus
to Zotero / EndNote / Reference
APA (6th Edition):
Steiner, A. K. (2018). 3D Digitization and Wear Analysis of Sauropod Teeth. (Masters Thesis). Bowling Green State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1525990888624381
Chicago Manual of Style (16th Edition):
Steiner, Alexis K. “3D Digitization and Wear Analysis of Sauropod Teeth.” 2018. Masters Thesis, Bowling Green State University. Accessed December 10, 2018.
MLA Handbook (7th Edition):
Steiner, Alexis K. “3D Digitization and Wear Analysis of Sauropod Teeth.” 2018. Web. 10 Dec 2018.
Steiner AK. 3D Digitization and Wear Analysis of Sauropod Teeth. [Internet] [Masters thesis]. Bowling Green State University; 2018. [cited 2018 Dec 10].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1525990888624381.
Council of Science Editors:
Steiner AK. 3D Digitization and Wear Analysis of Sauropod Teeth. [Masters Thesis]. Bowling Green State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1525990888624381