What proportion of the total skull length did the preorbital region account for in *Xiongguanlong*?
Answer
More than two-thirds
The preorbital region, defined as the anatomical area situated in front of the eye sockets, constitutes a highly elongated section of the *Xiongguanlong* skull. Detailed analysis reveals that this specific region is remarkably extensive, making up more than two-thirds of the skull's total length. This measurement highlights the defining difference between *Xiongguanlong* and derived Late Cretaceous tyrannosaurids, whose skulls were built for depth and mass to maximize bite force, rather than extreme elongation.
Related Questions
Where was the fossil specimen *Xiongguanlong baimoensis* unearthed from the geological record?How did *Xiongguanlong*'s estimated mass compare to the *T. rex* specimen SUE?What morphological descriptor is applied to *Xiongguanlong* due to its skull shape?What proportion of the total skull length did the preorbital region account for in *Xiongguanlong*?Which trait is absent in *Xiongguanlong* nasals but present in *Dilong* and *Eotyrannus*?What characteristic is noted for the serrations on the premaxillary teeth of *Xiongguanlong*?How are the maxillary teeth of *Xiongguanlong* described compared to later tyrannosaurs?How many pairs of pneumatic foramina do *Xiongguanlong*'s cervical centra possess compared to *Tyrannosaurus*?What characteristic of the axial neural spine is shared with more derived tyrannosaurids?Which other longirostrine tyrannosauroid do *Xiongguanlong*'s body proportions resemble?