Dabeigou Formation

Dabeigou Formation
Dabeigou Formation
Stratigraphic range: mid Valanginian-mid Hauterivian; ~135–130 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Jehol Biota
Sub-units	Numbered Members
Underlies	Dadianzi & Yixian Formations
Overlies	Zhangjiakou Formation
Thickness	Varies, in Yushuxia section 220 metres (720 ft)
Lithology
Primary	Sandstone, mudstone
Other	Tuffite, conglomerate, siltstone
Location
Coordinates	41°42′N 116°24′E / 41.7°N 116.4°E
Approximate paleocoordinates	43°36′N 118°30′E / 43.6°N 118.5°E
Region	Hebei
Country	China
	Dabeigou Formation (China) Dabeigou Formation (Hebei)

The Dabeigou Formation (simplified Chinese: 大北沟组; traditional Chinese: 大北溝組; pinyin: Dàběigōu zǔ) is a palaeontological formation located in Hebei, China. It dates from the mid Valanginian to Hauterivian age of the Cretaceous period, approximately 135 to 130 Ma.

Fossil content

Fossils include the confuciusornithiform bird Eoconfuciusornis. As of 2016^{[citation needed]} this is the oldest bird with a toothless beak known, but it belongs to a very ancestral avian lineage not closely related to living birds.

Birds

Jinguofortis perplexus

Amphibians

Regalerpeton weichangensis

Insects

References

↑ Dabeigou Formation at Fossilworks.org
↑ Qin et al., 2018
↑ Zhang et al., 2008
↑ Wang & Stidham, 2018
↑ Rong, 2018
1 2 3 4 5 6 Kopylov & Zhang, 2015
1 2 3 4 5 Hong, 1984
1 2 3 Zhang et al., 2009
1 2 3 Ren, 1995
1 2 3 4 5 Zhang, 1986

Bibliography

Qin, Zuohuan; Xi, Dangpeng; Sames, Benjamin; Do Carmo, Dermeval Aparecido; Wang, Xuri; Xu, Yankang; Yu, Zhiqiang; Wei, Feng; Leite, Amanda Moreira (2018), "Ostracods of the non-marine Lower Cretaceous Dabeigou Formation at Yushuxia (Luanping basin, North China): Implications for the early Jehol Biota age", Cretaceous Research, 86: 199–218, Bibcode:2018CrRes..86..199Q, doi:10.1016/j.cretres.2018.03.010, ISSN 0195-6671
Rong, Y.-F (2018), "Restudy of Regalerpeton weichangensis (Amphibia: Urodela) from the Lower Cretaceous of Hebei, China", Vertebrata PalAsiatica, 56: 121–136
Wang, M.; Stidham, T. A. (2018), "A new clade of basal Early Cretaceous pygostylian birds and developmental plasticity of the avian shoulder girdle", Proceedings of the National Academy of Sciences, 115 (42): 10708–10713, Bibcode:2018PNAS..11510708W, doi:10.1073/pnas.1812176115, PMC 6196491, PMID 30249638
Kopylov, D. S.; Zhang, H. C. (2015), "New ichneumonids (Insecta: Hymenoptera: Ichneumonidae) from the Lower Cretaceous of north China", Cretaceous Research, 52: 591–604, Bibcode:2015CrRes..52..591K, doi:10.1016/j.cretres.2014.03.012
Zhang, X. W.; Ren, D.; Pang, H.; Shih, C.K. (2009), "Late Mesozoic chresmodids with forewing from Inner Mongolia, China (Polyneoptera: Archaeorthoptera)", Acta Geologica Sinica, 84: 38–46, doi:10.1111/j.1755-6724.2010.00168.x
Zhang, Z.; Zhou, Z.; Benton, M. J. (2008), "A primitive confuciusornithid bird from China and its implications for early avian flight", Science in China Series D: Earth Sciences, 51 (5): 625–639, Bibcode:2008ScChD..51..625Z, doi:10.1007/s11430-008-0050-3
Ren, D (1995), Insecta, D. Ren, L.W. Lu, Z.G. Guo, S.A. Ji (eds.), Faunae and stratigraphy of Jurassic-Cretaceous in Beijing and the adjacent areas, pp. 47–121
Zhang, J. F (1986), Some fossil insects from the Jurassic of northern Hebei, China, The Paleontology and Stratigraphy of Shandong, pp. 74–84
Hong, Y. C (1984), Insecta, Palaeontological Atlas of North China, II, Mesozoic Volume, pp. 128–185

Dabeigou Formation

Fossil content

See also

References

Bibliography

Further reading