**FIGURE 1. **Size differences between *Ailurus fulgens *(1) and* *the two known skeletons* of Pristinailurus bristoli* (ETMNH 3596, 2; ETMNH 15000, 3). Shaded bones represent recovered elements from the two fossil skeletons.

**FIGURE 2. **(1) Boxplot of *Ailurus fulgens* lower canine area by sex. (2) Boxplot of *A. fulgens* upper canine area by sex. Horizontal bars indicate the median, boxes represent middle quartiles, and error bars extend 1.5 times the interquartile range. Open circles beyond these bars indicate outliers.

**FIGURE 3. **(1) Position of the standardized postcranial geometric means of the *Pristinailurus bristoli* within the standardized postcranial geometric mean distribution of a modeled* Ailurus fulgens* population. (2) Position of the standardized cranial geometric means of the* P. bristoli * pair within the standardized cranial geometric mean distribution of a modeled* A. fulgens *population.