High Quality Content by WIKIPEDIA articles! Sinocalliopteryx (meaning `Chinese beautiful feather`) is a genus of compsognathid dinosaur from the Lower Cretaceous Yixian Formation of China (Jianshangou Beds, dating to 124.6 Ma). While similar to the related Huaxiagnathus, Sinocalliopteryx is larger, and at 2.37 meters (7.78 ft) in length, it is the largest known compsognathid genus, and the large size of this "giant compsognathid" lent Sinocalliopteryx its specific name, S. gigas, meaning `giant.`Sinocalliopteryx is also distinguished from Huaxiagnathus, as well as other compsognathids, by its relatively long hands in relation to its arms, which were also longer overall than in most compsognathids, a feature possibly related to its size.