Carr, T.D.
taxonomy · morphology · ecology · methods
A multi-institution specimen series scores ontogenetic characters and tests a growth sequence; age classes are analytical assignments, not direct life histories.
A multi-institution growth series documents substantial ontogenetic cranial variation within referred Tyrannosaurus rex specimens, but ontogenetic assignment and synonymy remain analytical decisions rather than directly observed life histories.
claim:taxon:tyrannosaurus:taxonomyRobust cranial and dental anatomy and two-fingered forelimbs are repeatedly preserved, while the cited growth series shows that several skull proportions change across assigned ontogenetic stages.
claim:taxon:tyrannosaurus:morphology