Dabeigou Formation

The Dabeigou Formation is a palaeontological formation located in Hebei, China.[1] It dates from the mid Valanginian to Hauterivian age of the Cretaceous period, approximately 135 to 130 Ma.[2]

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	41.7°N 116.4°E
Approximate paleocoordinates	43.6°N 118.5°E
Region	Hebei
Country	China
Dabeigou Formation (China) Dabeigou Formation (Hebei)

Fossil content

Fossils include the confuciusornithiform bird Eoconfuciusornis.[3] As of 2016 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[4]

Amphibians

• Regalerpeton weichangensis[5]

Insects

• Amplicella beipiaoensis[6]
• A. exquisita[6]
• A. shcherbakovi[6]
• Brachyopteryx weichangensis[7]
• Chresmoda multinervis[8]
• C. shihi[8]
• Coptoclava longipoda[9]
• Glypta qingshilaensis[9]
• Hebeicoris xinboensis[7]
• Jibeigomphus xinboensis[7]
• Manlayamyia dabeigouensis[10]
• Mesasimulium laihaigouense[10]
• M. laiyangensis[10]
• Mesolygaeus hebeiensis[10]
• Mesoplecia xinboensis[7]
• Pleciofungivora yangtianense[7]
• Priscotendipes mirus[10]
• Vitimoilus ovatus[8]
• Zygadenia lenta[9]
• Amplicella sp.[6]
• Ichneumonidae indet.[6]
• Tanychorinae indet.[6]

See also

• List of fossil sites

References

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

Bibliography

• Qin, Zuohuan; Dangpeng Xi; Benjamin Sames; Dermeval Aparecido Do Carmo; Xuri Wang; Yankang Xu; Zhiqiang Yu; Feng Wei, and Amanda Moreira Leite. 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. 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., and T. A. Stidham. 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 _. _.
• Kopylov, D. S., and H. C. Zhang. 2015. New ichneumonids (Insecta: Hymenoptera: Ichneumonidae) from the Lower Cretaceous of north China. Cretaceous Research 52. 591–604.
• Zhang, X. W.; D. Ren; H. Pang, and C.K. Shih. 2009. Late Mesozoic chresmodids with forewing from Inner Mongolia, China (Polyneoptera: Archaeorthoptera). Acta Geologica Sinica 84. 38-46.
• Zhang, Z.; Z. Zhou, and M. J. Benton. 2008. A primitive confuciusornithid bird from China and its implications for early avian flight. Science in China Series D: Earth Sciences 51. 625–639.
• Ren, D. 1995. Insecta, 47–121. D. Ren, L.W. Lu, Z.G. Guo, S.A. Ji (eds.), Faunae and stratigraphy of Jurassic-Cretaceous in Beijing and the adjacent areas.
• Zhang, J. F. 1986. Some fossil insects from the Jurassic of northern Hebei, China, 74–84. The Paleontology and Stratigraphy of Shandong.
• Hong, Y. C. 1984. Insecta, 128–185. Palaeontological Atlas of North China, II, Mesozoic Volume.

Further reading

• Vickers-Rich, Patricia & Rich, Thomas Hewett (1993); Wildlife of Gondwana. Reed. ISBN 0-7301-0315-3