Fig 1.
Approximate geographic locations and stratigraphic positions of the tritylodontid taxa analyzed in this paper.
Map reprinted from Wikimedia Commons under a CC BY license, with permission from ‘E Pluribus Anthony’, original copyright 2006. The map is similar but not identical to the original map and is for illustrative purposes only.
Table 1.
Summary table of the studied taxa.
Fig 2.
Surface texture (coloured) meshed axiomatic models for species used in the ANOVA.
3D top view normalized in XYZ, 100% resolution, tile size = 160x160 μm; (a) Stereognathus ooliticus (GLRCM 2104); (b) Oligokyphus major (BRSUG 26300); (c) Stereognathus sp. (ZIN PH 64/117); (d) Stereognathus sibiricus (ZIN PH 9/154); (e) Kayentatherium wellesi (MCZ 8811); (f) Dinnebitodon amarali (MCZ 8830–1). Color scale corresponds to height on the z-axis with red representing higher elevations and blue lower elevations.
Table 2.
Stereoscopic microwear parameters for all individuals.
Table 3.
Pairwise comparisons of tritylodontid species with N ≥ 2.
Fig 3.
Scatter plot of principle components 1 and 3 on stereoscopic microwear parameters.
Stereoscopic microwear parameters used are: number of small pits (SP); number of large pits (LP); number of fine scratches (FS); number of coarse scratches (CS). Convex hulls embrace areas taken by taxa with N > 2; symbols represent individual means.
Fig 4.
Bivariate plot of stereomicroscopic microwear parameters: Number of fine scratches (FS) versus number of small pits (SP).
Convex hulls embrace the areas taken by taxa with N > 2; symbols represent individual means.
Table 4.
Surface texture parameters for all individuals.
Fig 5.
Scatter plot of principle components 1 and 2 on 3D surface texture parameters.
3D surface texture parameters used are: pit void volume (Vvv in μm3/μm2), mean dale area (Sda in μm2), peak density (Spd, 1/μm2) and arithmetic mean peak curvature (Spc, 1/μm). Convex hulls embrace the areas taken by each taxon (for taxa with n > 2); symbols represent individual means.
Fig 6.
Bivariate plot of surface texture parameters pit void volume (Vvv in μm3/μm2) versus mean dale area (Sda in μm2).
Convex hulls embrace the area taken by each taxon (for taxa > 2); symbols represent individual means.
Table 5.
Interpreted hardness of specific plant tissues as components of vertebrate diets.