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Dabeigou Formation 
Summary
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.[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 ~ | |
| 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) | |
Fossil content edit
Fossils include the confuciusornithiform bird Eoconfuciusornis.[3] 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
- Amphibians
- 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]
- Notocupes lentus[9]
- Amplicella sp.[6]
- Ichneumonidae indet.[6]
- Tanychorinae indet.[6]
See also edit
References edit
Bibliography edit
- 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 edit
- Vickers-Rich, Patricia & Rich, Thomas Hewett (1993); Wildlife of Gondwana. Reed. ISBN 0-7301-0315-3