Name: Yutyrannus huali
Name Meaning: Beautiful Feathered Tyrant
First Described: 2012
Described By: Xu et al
Classification: Dinosauria, Saurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Coelurosauria, Tyrannoraptora, Tyrannosauroidea
Yutyrannus was a decidedly feathered tyrannosauroid from the Yixian Formaton of Liaoning Province, China. It lived in the Aptian age of the Early Cretaceous, about 124.6 million years ago, and was a relatively primitive tyrannosaurid. It is known from three nearly complete skeletons, an adult, a subadult, and a juvenile. It was a large bipedal predator about 9 meters long and is one of the earliest that resembles the classic tyrannosaur form that we all know and love. It had long, 20 centimeters long filamentous feathers, covering various parts of the body, including the pelvis and the foot, neck, and upper arms. They might have covered the whole body and served in regulating temperature, giving the cold climate of the Yixian (around 10 degrees C/50 degrees F). As it grew, its lower legs, feet and forelimbs grew smaller, while the skull grew more robust and deep. Since two juveniles were found with an adult, its reasonable to suppose that it lived in family groups, and may have even hunted in packs.
Shout out goes to miroslavdino!