An Older and Exceptionally Large Adult Specimen of Tyrannosaurus rex Author Persons, Scott W Author Currie, Philip J. Author Erickson, Gregory M. text The Anatomical Record 2019 2019-03-21 302 1 17 journal article 26442 10.1002/ar.24118 eab2b696-915d-4d62-b5a7-b5188c1e4cbb 3251817

TABLE 2. Comparison of femoral dimensions and estimated body mass of the largest theropods ± 25% (mass estimation based on the formula of Campione et al. (2014))

Species	Specimens	Femur length (mm)	Femur circumference (mm)	Body mass (kg)
Note. There are a great number of problematic assumptions in the mass estimate of Spinosaurus aegyptiacus, see main text for details.
Tyrannosaurus rex	RSM P2523.8	1,330	590	8,870
Acrocanthosaurus atokensis	NCSM 14345	1,277	425	3,590
Chilantaisaurus tashuikouensis	IVPP V.2884	1,190	430	3,710
Deinocheirus mirificus	MPC KID447	1,300	520	6,260
Giganotosaurus carolinii	MUCPv-CH 1	1,365	520	6,260
Mapusaurus rosei	PVPH.108.44	1,170	435	3,830
Mapusaurus rosei	PVPH.108.203	1,205	415	3,370
Mapusaurus rosei	PVPH.108.233	1,115	420	3,480
Saurophaganax maximus	OMNH 01708	1,130	435	3,830
Spinosaurus aegyptiacus	Ibrahim et al. (2014)	830	320	1,645
Suchomimus tenerensis	MNN GDF 500	1,080	410	3,260
Tyrannotitan chubutensis	MPEF-PV 1156	1,265	520	6,260
Tyrannotitan chubutensis	MPEF-PV 1157	1,330	505	5,780