Nonotyrannus是一种独特的、完全成熟的恐龙物种,而不是一个年轻的T. rex,新的研究证实了这一点。 Nanotyrannus was a distinct, fully grown dinosaur species, not a young T. rex, new study confirms.

Paleontlogists已经证实,Nanotyrannus lancensis 是一种与暴龙龙菌完全不同的物种,不是幼龙菌,而是T. rex,基于对一种类骨的分析,显示标本为15至18岁,接近完全成熟。 Paleontologists have confirmed Nanotyrannus lancensis was a distinct species from Tyrannosaurus rex, not a juvenile T. rex, based on analysis of a hyoid bone showing the specimen was 15 to 18 years old—nearly fully mature. 关键的解剖差异,包括更多的牙齿、头顶、独特的空气空间和前置第三指,支持将它分类为单独的捕食者。 Key anatomical differences, including more teeth, a skull crest, unique air spaces, and a vestigial third finger, support its classification as a separate predator. Nanotyrannus比T. rex小,长约16.4英尺,体重约700公斤,以长腿和强臂的速度建造。 Smaller than T. rex, Nanotyrannus was about 16.4 feet long and weighed roughly 700 kg, built for speed with long legs and strong arms. 这项发现揭示了北美白纪晚期共存的两种大型食肉动物, 重塑了对灭绝前生态系统的理解. The findings reveal two large carnivores coexisted in Late Cretaceous North America, reshaping understanding of pre-extinction ecosystems. 类骨骼研究为在没有肢体骨骼时评估恐龙成熟程度提供了新方法。 The hyoid bone study offers a new method for assessing dinosaur maturity when limb bones are absent.