Temporal range: Early Cretaceous, 125-121 Ma
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: Compsognathidae
Genus: Beipiaognathus
Hu et al., 2016
B. jii
Binomial name
Beipiaognathus jii
Hu et al., 2016

Beipiaognathus (meaning Beipiao jaw) is a dubious genus of coelurosaurian theropod from the Early Cretaceous Yixian Formation of Liaoning, China.[1]

The genus was initially assigned to the Compsognathidae based on the presence of two traits: fan-shaped dorsal neural spines and a robust I-1 phalanx on the hand.[1] However, it also differs from other compsognathids in several ways: the teeth are unserrated and conical; the ulna is proportionally longer; the II-1 phalanx on the hand is longer and more robust; and the tail is much shorter.[1]

However, Andrea Cau has informally noted a number of points in the fossil that are indicative of it having been artificially assembled, thus rendering the specimen a phylogenetically uninformative chimaera.[2]


  1. ^ a b c Hu, Y; Wang, X; Huang, J (2016). "A new species of compsognathid from the Early Cretaceous Yixian Formation of Western Liaoning, China". Journal of Geology. 40: 191–196.
  2. ^ Cau, A (2016). Lo status (pale)ontologico di Beipiaognathus (in Italian) Theropoda.