Open Paleo

Jiangxisaurus

Wei et al., 2013 JAHNG-shee-SAWR-us

Named after Jiangxi Province of southern China, where the specimen was found

72.2–66.0 million years ago Maastrichtian, Late Cretaceous
Late Cretaceous stages

Jiangxisaurus is an extinct genus of oviraptorid theropod dinosaur from the Late Cretaceous Nanxiong Formation of southern China.

Diagnosis

  1. Weakly downturned mandibular symphysis (rostrum only slightly downturned, contrasting with strongly downturned rostrum of most oviraptorids)
  2. Surangular with an elongated and concave lateral surface
  3. Much elongated mandible with height-to-length ratio of approximately 20% (vs. 36% in Nemegtomaia)
  4. Length ratio of radius to humerus approximately 70% (lowest range among oviraptorids)

Species

Jiangxisaurus ganzhouensis Wei et al., 2013

Type species

Named for Ganzhou, the city in Jiangxi Province, southern China, where the specimen was discovered.

Holotype
HGM 41HIII-0421 , Henan Geological Museum
Material
Incomplete skeleton with partial skull including lower jaw, eight cervical, three dorsal and nine caudal vertebrae, two chevrons, nearly complete pectoral girdle and left forelimb, both sternal plates, and sternal and dorsal ribs.
Horizon
Nanxiong Formation, Maastrichtian, Late Cretaceous , 72.2–66.0 million years ago
Locality
Longling, Nankang, Jiangxi, China Wei and colleagues (2013) give "Red sandstones of Upper Cretaceous Nanxiong Formation". Yao and colleagues (2026) list an oviraptorid, citing Wei and colleagues, among the vertebrates of the Zhoutian Formation of the Ganzhou Group, exposed at Longling, without section data for the specimen.

References

  1. Wei, X.; Pu, H.; Xu, L.; Liu, D.; Lü, J. (2013). A new oviraptorid dinosaur (Theropoda: Oviraptorosauria) from the Late Cretaceous of Jiangxi Province, southern China. Acta Geologica Sinica (English Edition) 87(4): 899-904. doi:10.1111/1755-6724.12098 wei2013a
  2. Yao, H.; Qiu, W.; Yu, J.; Yang, L.; Wang, H.; Cao, S.; Zhao, K.; Xu, M.; Shi, G.; Lou, F.; Zeng, C.; Lu, P.; Wu, R.; Xu, X.; Han, F.; Xing, H. (2026). A new saurolophine hadrosaurid (Dinosauria: Ornithopoda) from the Upper Cretaceous of South China, providing further support for the possible Asian origin of Brachylophosaurini. Journal of Systematic Palaeontology 24(1): 2635569. Informa UK Limited. doi:10.1080/14772019.2026.2635569

    Lists the genus among the Zhoutian Formation's vertebrates, against the describing paper's Nanxiong Formation.

    yao2026a