Fig. 4 in Theropod teeth from the upper Maastrichtian Hell Creek Formation "Sue" Quarry: New morphotypes and faunal comparisons

Fig. 4. Principal components analysis of troodontid teeth from Hell Creek and Lance formations (×) and alleged troodontid tooth FMNH PR 2901 from the "Sue" quarry (circle). Analysis contained variables height, FABL, and denticles/mm. PC 1 ([0.45 FABL]+[0.20 basal width]+[0.68 height]-[0.55 denticles/mm]) explained 48.04% of the variance. PC 2 ([0.01 FABL]+[0.03 basal width]+[0.62 height]+[0.78 denticles/mm]) explained 40.73% of the variance. PC 3 ([0.88 FABL]+[0.05 basal width]-[0.37 height]+[0.28 denticles/mm]) explained 9.46% of the variance.