Jiufotang Formation

Jiufotang Formation Stratigraphic range: Aptian
Type	Geological formation
Unit of	Jehol Group
Sub-units	Shangheshou Bed, Meileyingzi Bed
Underlies	Fuxin Formation
Overlies	Yixian Formation
Location
Region	Liaoning
Country	China

The Jiufotang Formation is an Early Cretaceous geological formation in Chaoyang, Liaoning which has yielded fossils of feathered dinosaurs, primitive birds, pterosaurs, and other organisms. (see Jehol Biota). It is a member of the Jehol group. The exact age of the Jiufotang has been debated for years, with estimates ranging from the Late Jurassic to the Early Cretaceous. He et al. (2004) used argon - isotope radiometry to confirm biostratigraphic age estimates. They confirmed an Early Cretaceous, Aptian age for the Jiufotang Formation, 120.3 +/-0.7 million years ago. Fossils of Microraptor and Jeholornis are from the Jiufotang.^[1]

1 Fauna
2 See also
3 References

Fauna

Choristoderans

Genus	Species	Notes
Philydrosaurus	Philydrosaurus proseilus	Monjurosuchid
Ikechosaurus	Ikechosaurus pijiagouensis	Simoedosaurid
Liaoxisaurus	Liaoxisaurus chaoyangensis	Simoedosaurid

Fish

Genus	Species	Notes
Jinanichthys	Jinanichthys longicephalus	An osteoglossiform.
Lycoptera	Lycoptera davidi	An osteoglossiform.
Peipiaosteus	Peipiaosteus pani	A fish related to Sturgeons.
Protosephurus	Protosephurus liui	A Paddlefish.
Sinamia	Sinamia zdanskyi	A Bowfin.

Mammals

Several mammal specimens have been found from the Jiufotang, but only one has been formally described and named.

Genus	Species	County	Member	Abundance	Notes
Liaoconodon	Liaoconodon hui^[2]			Nearly complete skeleton	A eutriconodont
Unnamed mammal	Unnamed			Partial remains including a foot and fragments of the skull	A mammal similar to Eomaia and Sinodelphys from the Yixian Formation. Found as stomach contents of Microraptor zhaoianus.

Ornithischians

Genus	Species	County	Member	Material	Notes	Images
Psittacosaurus	Psittacosaurus meileyingensis		Meileyingzi Bed	"[Four] individuals, [two] complete skulls."^[3]	A ceratopsian.
Psittacosaurus	Psittacosaurus mongoliensis		Shangheshou and Meileyingzi Beds		A ceratopsian.

Pterosaurs

Genus	Species	Notes
Chaoyangopterus	Chaoyangopterus zhangi	A chaoyangopterid.^[4]
Eoazhdarcho	Eoazhdarcho liaoxiensis	A chaoyangopterid.^[4]
Eopteranodon	Eopteranodon lii	A chaoyangopterid.^[4]
Huaxiapterus	Huaxiapterus benxiensis	A tapejarid.^[4]
	Huaxiapterus corollatus
	Huaxiapterus jii
Jidapterus	Jidapterus edentus	A chaoyangopterid.^[4]
Liaoningopterus	Liaoningopterus gui	An ornithocheirid.^[4]
Liaoxipterus	Liaoxipterus brachyognathus	An istiodactylid.^[4]
Nemicolopterus	Nemicolopterus crypticus	A dsungaripteroid.
Nurhachius	Nurhachius ignaciobritoi	An istiodactylid.^[4]
Sinopterus	Sinopterus dongi	A tapejarid.^[4]
Sinopterus	Sinopterus gui	A tapejarid.^[4]

Saurischians

An unnamed species of titanosaur is also present in the formation.^[5]

Enantiornithines

Genus	Species	Material	Notes
Alethoalaornis	Alethoalaornis agitornis^[6]		An enantiornithine
Boluochia	Boluochia zhengi	"Partial skull [and] partial postcranium."^[7]	An enantiornithine
Cathayornis	Cathayornis aberransis		An entantiornithine
	Cathayornis caudatus		Nomen dubium^[8]
	Cathayornis yandica	"Partial skeleton."^[7]	An enantiornithine
Cuspirostrisornis	Cuspirostrisornis houi		An enantirontihine
Dapingfangornis	Dapingfangornis sentisorhinus		An enantiornithine
Eocathayornis	Eocathayornis walkeri	"Partial skeleton."^[7]	An enantirontihine
Huoshanornis	Huoshanornis huji		An enantirontihine
Largirostrornis	Largirostrornis sexdentoris		An enantirontihine
Longchengornis	Longchengornis sanyanensis		An enantirontihine
Longipteryx	Longipteryx chaoyangensis		A possible enantiornithine
Rapaxavis	Rapaxavis pani		An enantiornithine
Sinornis	Sinornis santensis	"Partial skull [and] many nearly complete postcranial skeletons."^[9]	An enantiornithine

Ornithurans

Genus	Species	County	Material	Notes
Aberratiodontus	Aberratiodontus wui			Junior synonym of Yanornis martini^[10]
Chaoyangia	Chaoyangia beishanensis		"Partial skeleton."^[9]	An ornithuran
Jianchangornis	Jianchangornis microdonta	Jianchang		An ornithuran
Parahongshanornis^[11]	Parahongshanornis chaoyangensis			A Hongshanornithid
Songlingornis	Songlingornis linghensis			An ornithuran.
Yanornis	Yanornis martini			An ornithuran.
Yixianornis	Yixianornis grabaui			An ornithuran.

Misc theropods

Genus	Species	County	Member	Material	Notes
Confuciusornis	Confuciusornis sanctus				A primitive short-tailed bird (pygostylian). Also present in the Yixian Formation
Confuciusornis	Confuciusornis jianchangensis	Liaoning
Cryptovolans	Cryptovolans pauli				Junior synonym of Microraptor gui^[12]
Dalianraptor	Dalianraptor cuhe				A basal avialan
Didactylornis	Didactylornis jii				Junior synonym of Sapeornis chaoyangensis^[13]
Jeholornis^[1]	Jeholornis prima^[1]				A basal avialan, also present in the Yixian Formation^[13]
Jeholornis^[1]	Jeholornis palmapenis^[14]				A basal avialan
Microraptor	Microraptor gui		Shangheshou Bed	Extremely common^[5]	A dromaeosaurid
Microraptor	Microraptor zhaoianus		Shangheshou Bed^[5]	"At least [three] partial semiarticulated postcrania and several skulls."^[15] Feathered integument is also preserved.^[15]	A dromaeosaurid
Omnivoropteryx	Omnivoropteryx sinousaorum				An omnivoropterygiform
Sapeornis	Sapeornis angustis			"Nearly complete skeleton without skull."^[16]	An omnivoropterygiform, a primitive short-tailed bird
Sapeornis	Sapeornis chaoyangensis				An omnivoropterygiform, a primitive short-tailed bird
Shenshiornis	Shenshiornis primita^[17]				An omnivoropterygiform
Similicaudipteryx	Similicaudipteryx yixianensis				An oviraptorosaur
Sinotyrannus^[18]	Sinotyrannus kazuoensis^[18]				A tyrannosauroid^[18]
Shenzhouraptor	Shenzhouraptor orientalis				Junior synonym of Jeholornis prima^[13]
Zhongjianornis	Zhongjianornis yangi				A primitive short-tailed bird^[19]

References

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	Dinosaurs portal

^ ^a ^b ^c He, H.Y., Wang, X.L., Zhou, Z.H., Wang, F., Boven, A., Shi, G.H., Zhu R.X. (2004). "Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China, and its implications". Geophysical Research Letters 31(13): 1709.
^ Meng, J., Wang, Y., and Li, C. (2011). "Transitional mammalian middle ear from a new Cretaceous Jehol eutriconodont". Nature, 472: 181-185. doi:10.1038/nature09921
^ "Table 22.1," in Weishampel, et al. (2004). Page 479.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Wang, X. and Zhou, Z. (2006). "Pterosaur assemblages of the Jehol Biota and their implication for the Early Cretaceous pterosaur radiation ."Geological Journal, 41: 405-418.
^ ^a ^b ^c Xu, X. and Norell, M.A. (2006). "Non-Avian dinosaur fossils from the Lower Cretaceous Jehol Group of western Liaoning, China."Geological Journal, 41: 419-437.
^ Li, L., Hu, D.-Y., Duan, Y., Gong, E.-P. and Hou, L.-H. (2007). "Alethoalaornithidae fam. nov., a new family of enantiornithine bird from the Lower Cretaceous of western Liaoning." Acta Palaeontologica Sinica, 46(3): 365-372. (http://www.cqvip.com/qk/90074X/200703/25642898.html) [in Chinese]
^ ^a ^b ^c "Table 11.1," in Weishampel, et al. (2004). Page 212.
^ O'Connor, J. and Dyke, G. (2010). "A reassessment of Sinornis santensis and Cathayornis yandica (Aves: Enantiornithes)." Records of the Australian Museum, 62: 7-20. doi:10.3853/J.0067-1975.62.2010.1540
^ ^a ^b "Table 11.1," in Weishampel, et al. (2004). Page 214.
^ Cau, A. and Arduini, P. (2008). "Enantiophoenix electrophyla gen. et sp. nov. (Aves, Enantiornithes) from the Upper Cretaceous (Cenomanian) of Lebanon and its phylogenetic relationships." Atti della Societa Italiana di Scienze Naturali e del Museo Civico di Storia Naturale in Milano, 149: 293-324.
^ Li, Li; Jing-Qi Wang and Shi-Lin Hou (2011). "A new ornithurine bird (Hongshanornithidae) from the Jiufotang Formation of Chaoyang, Liaoning, China". Vertebrata PalAsiatica 49 (2): 195–200. http://www.ivpp.cas.cn/cbw/gjzdwxb/xbwzxz/201105/P020110530508998177705.pdf.
^ Senter, P., Barsold, R., Britt, B.B., and Burnham, D.A. (2004). "Systematics and evolution of Dromaeosauridae (Dinosauria, Theropoda)." Bulletin of the Gunma Museum of Natural History, 8: 1-20.
^ ^a ^b ^c Li, D., Sulliven, C., Zhou, Z. and Zhang, Z. (2010). "Basal birds from China: a brief review." Chinese Birds, 1(2): 83-96 doi:10.5122/cbirds.2010.0002
^ O'Connor, J.K., Sun C., Xu X., Wang X. and Zhou Z. (In press). "A new species of Jeholornis with complete caudal integument." Historical Biology, (advance online publication). doi:10.1080/08912963.2011.552720
^ ^a ^b "Table 10.1," in Weishampel, et al. (2004). Page 198.
^ "Table 11.1," in Weishampel, et al. (2004). Page 216.
^ Hu, D., Li, L., Hou, L., and Xu, X. (2010). "A new sapeornithid bird from China and its implication for early avian evolution." Acta Geologica Sinica, (English Edition) 84(3): 472-482. doi:10.1111/j.1755-6724.2010.00188.x
^ ^a ^b ^c Ji, Q., Ji, S.-A., and Zhang, L.-J. 2009. First large tyrannosauroid theropod from the Early Cretaceous Jehol Biota in northeastern China. Geological Bulletin of China 28(10):1369-1374.
^ Zhou, Z., Zhang, F. and Li, Z. (2010). "A new Lower Cretaceous bird from China and tooth reduction in early avian evolution." Proceedings of the Royal Society B, 277(1679): 219-227.doi:10.1098/rspb.2009.0885

Wang Y, Evans SE. 2011. A gravid lizard from the Cretaceous of China and the early history of squamate viviparity. Naturwissenschaften DOI: 10.1007/s00114-011-0820-1