Figure (IMAGE)

Natural History Museum of Los Angeles County

Figure

Caption

A size comparison of the hyoid in juvenile and subadult T. rex with Nanotyrannus (above). While Nanotyrannus would have been slightly smaller than the NHM’s juvenile T. rex, the signs of maturity are clear under the microscope (below). The greater number and more closely spaced growth rings (8 vs. ~2 in the teenage T. rex!) reveal the holotype of Nanotyrannus was both fully mature and a distinct species.

Credit

Dr. Zach Morris

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Must credit Dr. Zach Morris

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