Fig. 3: Summary of stress mark data from a selection of South African (orange) and Antarctic (blue) specimens of Lystrosaurus.
From: Evidence of torpor in the tusks of Lystrosaurus from the Early Triassic of Antarctica
These graphs represent transects collecting the thickness (μm) of stress lines moving from the pulp cavity (to left) to the outer edge of the tusks (to right). Green boxes highlight durations without visible stress lines and gray boxes highlight portions of the tusk with closely spaced stress lines suggesting a stressful interval. The height of the boxes represents the thickest stress line during such period. See Supplementary Fig. 1 for transects from entire sample.
