A high-resolution growth series of Tyrannosaurus rex obtained from multiple lines of evidence Author Carr, Thomas D. Department of Biology, Carthage College, Kenosha, WI, USA text PeerJ 2020 8 e 9192 e 9192 journal article 224105 10.7717/peerj.9192 d363523c-cf93-410c-808d-0da6b8d62ff6 5824972
Table 2 An assessment of evidence for sexual dimorphism in Tyrannosaurus rex based on character states that are unambiguously optimized as individual variation. The female specimen MOR 1125 shares homologous character transformations with five other specimens, but these shared changes are not common to all of the specimens, which would be expected if they represented diagnostic character states unique to one sex. Based on this lack of pattern it is inferred that character states unique to females are absent and, by extension, the skeleton of T. rex is not sexually dimorphic.
MOR 1125CMNH 7541LACM 150167MOR 555BMRP 2002.4.1AMNH FARB 5117
330. Maxilla, subnrl frmn, dpth, 0 => 1330, 0=>1
419. Maxilla, js for jgl, rstrl extnt, 0 => 1419, 0=>1
449. Lacrimal, drsl rms, sbctns srfc, hght, 0 => 1449, 0=>1
618. Postorbital, drsl mrgn, ornnttn, 1 => 2618, 0=>1
728. Quadratojugal, sq pr, rstrl srfc, 1 => 2728, 1=>2
963. Parietal, sggtl crst, cdl end, extnt, 0 ==> 1963, 0 ==> 1
973. Parietal, prtsoc pllr, prsnc, 1 => 2973, 1=>2
1022. Basioccipital, occ con, cdl mrgn, 0 => 11022, 0=>1