New Examples of Tyrannosaurus rex from the Lance Formation of Wyoming, United States Author Dalman, Sebastian G. Department of Geosciences, Fort Hays State University, 600 Park Street, Hays, KS 67601 USA sebastiandalman@yahoo.com text Bulletin of the Peabody Museum of Natural History 2013 2013-10-31 54 241 254 journal article 21674 10.3374/014.054.0202 7a23d441-2224-4f17-9775-825dd8bfc76e 3897695

TABLE 1. Morphometric data of Tyrannosaurus rex teeth from the Lance Formation (Upper Cretaceous, Late Maastrichtian) of Wyoming, USA. According to the methods of Smith et al. (2005). Abbreviations: AL, apical length of the crown tooth; CAA, crown tooth apex angle; CBL, crown tooth base length; CBR, crown tooth base ratio; CBW, crown tooth base width; CH, crown tooth height; CHR, crown tooth height ratio; DA, distal apical; DAVG, distal average serration densities; DB, distal basal; DC, distal mid-crown; iso, isolated; MA, mesial apical; MAVG, mesial average serration densities; MB, mesial basal; MC, mesial mid-crown; mx, maxillary tooth; NA, not available; pm, premaxillary tooth. All measurements are in millimeters.

Specimen	(A) 1	(B) 1	(A) 2	(B) 2	(C) 2	(D) 2	(E) 2	(F) 2	(G) 2
1 YPM VP 002220. 2 YPM VP 054459.
Side	NA	NA	NA	NA	NA	NA	NA	NA	NA
Position	pm	mx	iso	iso	iso	iso	iso	iso	iso
CBL	16.10	20.00	10.20	18.00	22.20	10.00	10.20	13.00	12.23
CBW	15.31	10.10	8.00	10.20	12.10	2.10	2.14	11.00	10.50
CH	48.00	40.00	16.00	40.00	NA	19.99	22.00	30.00	32.53
AL	54.00	42.20	18.00	42.00	NA	21.00	20.50	33.10	33.41
CBR	0.95	0.50	0.78	0.56	0.54	0.21	0.20	0.84	0.85
CHR	2.98	2.00	NA	4.00	NA	1.99	2.15	2.30	2.65
CAA	77.00	73.00	73.00	47.10	NA	62.00	62.53	64.50	67.00
MA	10.8	8.00	8.00	11.50	NA	6.10	9.90	9.92	9.87
MC	9.23	8.00	9.00	9.21	NA	6.23	10.12	10.11	11.21
MB	9.30	10.20	NA	10.10	NA	7.11	10.00	10.00	12.10
DA	11.31	9.30	0.00	9.32	NA	7.22	9.91	9.93	9.84
DC	8.10	7.10	0.00	7.10	NA	0.00	0.00	9.97	11.23
DB	NA	9.30	NA	9.31	NA	0.00	0.00	9.45	13.11
MAVG	9.70	9.30	NA	NA	0.00	NA	NA	NA	NA
DAVG	10.00	8.40	NA	NA	0.00	NA	NA	NA	NA