Table 1.

Descriptive statistics

Wear	P. t. troglodytes					G. g. gorilla
	Md	Ed	Hyd	Hd	Pd	Md	Ed	Hyd	Hd	Pd
Mean cusp slope
1	–	–	–	–	–	44.0	–	43.1	–	–
2	37.2	36.4	–	34.4	29.5	41.9	44.0	–	42.6	–
3	37.6	35.4	29.4	33.3	32.8	38.8	41.8	42.8	39.9	36.4
4	32.7	33.8	29.9	33.0	31.6	39.0	40.2	33.2	38.6	37.9
5	30.4	32.0	25.3	29.0	27.7	37.7	37.9	38.2	36.3	38.2
6	–	28.9	25.4	26.1	37.5	32.4	28.9	30.1	28.9	–
7	–	17.9	36.6	21.2	–	–	26.3	27.3	31.7	–
8	–	28.5	31.1	27.8	–	43.9	–	–	–	–
Mean angularity*
1	–	–	–	–	–	0.944	–	0.923	–	–
2	0.952	0.954	–	0.947	0.945	0.948	0.946	–	0.944	–
3	0.954	0.952	0.958	0.951	0.954	0.949	0.949	0.955	0.948	0.954
4	0.945	0.956	0.960	0.953	0.957	0.947	0.945	0.958	0.946	0.954
5	0.955	0.954	0.961	0.954	0.957	0.951	0.949	0.956	0.946	0.953
6	–	0.958	0.955	0.956	0.953	0.955	0.957	0.953	0.955	–
7	–	0.961	0.941	0.960	–	–	0.958	0.957	0.957	–
8	–	0.957	0.957	0.958	–	0.952	–	–	–	–

Wear scores are defined following Scott's (15) method. Md, Metaconid; Ed, Entoconid; Hyd, Hypoconulid; Hd, Hypoconid; Pd, Protoconid. 

^*Add 89° to each value for angularity measurement.