The
Hekou Group is a geological group in
Gansu Province,
China . It is
Early Cretaceous in age. Many dinosaur fossils have been recovered from the Hekou Group, including
iguanodonts , large
sauropods , and
armored dinosaurs .
Fossil eggs are rare, but one oogenus,
Polyclonoolithus , was discovered in the Hekou Group. Extensive
fossil tracks belonging to
pterosaurs and dinosaurs have also been described. The group spans the
Valanginian to
Albian and can be subdivided into four formations.
Vertebrate paleofauna
Dinosaurs
Saurischians
Genus
Species
Region
Material
Notes
Images
Daxiatitan D. binglingi
Upper; Lanzhou-Minhe Basin
A partial skeleton including cervical, dorsal, and caudal vertebrae, ribs, and a haemal arch , scapulocoracoid, and femur
A large titanosauriform sauropod
Huanghetitan H. liujiaxiaensis
Upper; Lanzhou-Minhe Basin
A partial skeleton including caudal vertebrae, a partial sacrum and ribs, and the left shoulder girdle
A large titanosauriform sauropod
Yongjinglong Y. datangi
Upper; Lanzhou-Minhe Basin
A partial skeleton including teeth, cervical and dorsal vertebrae, a rib, the left scapulocoracoid, and the right ulna and radius
A euhelopodid titanosauriform sauropod
Ornithischians
Genus
Species
Region
Material
Notes
Images
Lanzhousaurus L. magnidens
A partial skeleton including the mandible, maxillary teeth, dentary teeth, cervical and dorsal vertebrae, sternal plates, ribs, and pubes
A large styracosternan iguanodontian
Stegosaurus S. sp.
Upper member; Lanzhou-Minhe Basin
A partial skeleton including cervical and dorsal vertebrae, ribs, a right forelimb (including a partial humerus, ulna, and radius), and one dermal plate
A stegosaur distinct from Wuerhosaurus and Stegosaurus stenops . Likely contemporary with Taohelong .
Taohelong T. jinchengensis
Upper member; Lanzhou-Minhe Basin
A partial skeleton including ribs, a left ilium, a caudal vertebra, and part of the sacral shield
A nodosaurid ankylosaur, originally described as the first Asian member of the Polacanthinae
Fish
References
^ Xi, D.; Wan, X.; Li, G.; Li, G. (2018). "Cretaceous integrative stratigraphy and timescale of China". Science China Earth Sciences . 61 : 1–31. doi :10.1007/s11430-017-9262-y . ^ Xie, J.-F., Zhang, S.-K., Jin, X.-S., Li, D.-Q., and Zhou, L.-Q. (2016) "A new type of dinosaur eggs from Early Cretaceous of Gansu Province, China. Archived 2016-01-29 at the Wayback Machine " Vertebrata PalAsiatica , 54(1):1-10.
^ Lockley, M.; Harris, J.D.; and Mitchell, L. 2008. "A global overview of pterosaur ichnology: tracksite distribution in space and time." Zitteliana . B28. p. 187-198. ISSN 1612-4138 .
^ Li, Dawing; Azuma, Yoichi; Fujita, Masato; Lee, Yuong-Nam; Arakawa, Yohei (2006). "A preliminary report on two new vertebrae track sites including dinosaurs from the Early Cretaceous Hekou Group, Gansu Province, china" . Journal of the Paleontological Society of Korea . 22 (1): 29–49. ^ Li, L. G.; Li, D. Q.; You, H. L.; Dodson, P. (2014). Butler, Richard J (ed.). "A New Titanosaurian Sauropod from the Hekou Group (Lower Cretaceous) of the Lanzhou-Minhe Basin, Gansu Province, China" . PLOS ONE . 9 (1): e85979. Bibcode :2014PLoSO...985979L . doi :10.1371/journal.pone.0085979 PMC 3906019 PMID 24489684 . ^ Mannion, P.D.; Upchurch, P.; Jin, X.; Zheng, W. (2019). "New information on the Cretaceous sauropod dinosaurs of Zhejiang Province, China: impact on Laurasian titanosauriform phylogeny and biogeography" . Royal Society Open Science . 6 (8): 191057. Bibcode :2019RSOS....691057M . doi :10.1098/rsos.191057 PMC 6731702 PMID 31598266 . ^ You, Hailu; Ji, Qiang; Li, Daqing (2005). "Lanzhousaurus magnidens gen. et sp. nov. from Gansu Province, China: the largest-toothed herbivorous dinosaur in the world" [中国甘肃发现世界上最大牙齿的植食性恐龙：巨齿兰州龙（新属、新种)]. Geological Bulletin of China . 24 (9): 785–794. ISSN 1671-2552 . ^ Li, Ning; Li, Daqing; Peng, Guangzhao; You, Hailu (2024). "The first stegosaurian dinosaur from Gansu Province, China" . Cretaceous Research 158 (in press). 105852. Bibcode :2024CrRes.15805852L . doi :10.1016/j.cretres.2024.105852 . ^ Yang J.-T.; You H.-L.; Li D.-Q.; Kong D.-L. (2013). "First discovery of polacanthine ankylosaur dinosaur in Asia" (PDF) . Vertebrata PalAsiatica (in Chinese and English). 51 (4): 265–277. ^ Peng, Cuo; Murray, Alison M.; Brinkman, Donald B.; Zhang, Jiang-Yong; You, Hai-Lu (2015-03-04). "A new species of Sinamia (Amiiformes, Sinamiidae) from the Early Cretaceous of Lanzhou Basin, Gansu, China". Journal of Vertebrate Paleontology 35 (2): e902847. Bibcode :2015JVPal..35E2847P . doi :10.1080/02724634.2014.902847 . ISSN 0272-4634 .
See also
