A gigantic feathered dinosaur from the Lower Cretaceous of China

Holotype ZCDM V5000 and referred specimens ZCDM V5001 and ELDM V1001 preserve filamentous integument in association with large tyrannosauroid skeletons; feather distribution and structure are observed, but insulation, display and whole-body coverage are functional reconstructions.

Yutyrannus is represented by three associated Lower Cretaceous Yixian Formation specimens; they establish a sampled local occurrence, not a complete genus range or a tyrannosauroid feather origin.

Yutyrannus huali is described from three nearly complete skeletons representing two ontogenetic stages, and its basal tyrannosauroid placement is the result of the study's sampled phylogenetic analysis rather than a direct-ancestor claim.

The named Yutyrannus skeletons preserve a three-fingered manus, a typical theropod pes and long filamentous integumentary structures; these described structures do not directly establish their colour, complete body coverage or a single function.

This profile's geographic statement is limited to the Lower Cretaceous Yixian Formation of Liaoning Province, China, from which the three named Yutyrannus skeletons were reported; it does not assert a genus-wide distribution.

The cited study records specimen anatomy, large body size and filamentous integument but does not directly observe diet, habitat preference, locomotor behaviour, insulation, display or performance; those ecological interpretations remain unassigned here.