Mean, standard deviation (SD), and <i>p</i>-values for dental microwear characters (<i>Asfc, epLsar, Smc, Tfv, HAsfc₍₃</i>_×<i>3)</i><i>, HAsfc₍₉</i>_×<i>9)</i>) of extinct taxa from different temporal pits at Rancho La Brea, California.

*Significant values (p<0.05; Kruskal-Wallis test). Mean calibrated ages in years before present (and standard deviations) for the pits studied are noted in order from oldest to youngest: Pit 77, 35370 (no SD reported); Pit 91, 29068 (18367); Pit 3, 18593 (5541); Pit 4, 14546 (7768); and, Pit 67 (61–67 was examined), 11581 (3768; all dates are taken from Ref. 7). S. fatalis consists of only specimens from Pits 3, 67, and 91; however, P. atrox required supplemental specimens from similarly aged pits to increase sample sizes, temporally. Asfc, area-scale fractal complexity; epLsar, anisotropy; Smc, scale of maximum complexity; Tfv, texture fill volume; HAsfc(3×3), HAsfc(9×9) heterogeneity of complexity in a 3×3 and 9×9 grid, respectively.