Chaganbulage Formation

Chaganbulage Formation
Stratigraphic range: Late Middle Eocene or Late Eocene (Ulangochuian)
TypeFormation
Location
RegionInner Mongolia
CountryChina

The Chaganbulage Formation, also called the Qaganbulag Formation, is a geologic formation in Inner Mongolia, northern China. The deposits of the Chaganbulage Formation date to the late Middle Eocene or Late Eocene, and its mammal fossils are correlated to the Ulangochuian land mammal age.

Fossil fauna

Artiodactyla

Genus/family Species Notes/affinities Images
Cervidae Cervidae indet. Supposedly a cervid.
Lophiomeryx L. cf. gracilis A lophiomerycid.

"Insectivora"

Genus/family Species Notes/affinities Images
"Insectivora" "Insectivora" indet. An insectivore.

Lagomorpha

Genus/family Species Notes/affinities Images
Gobiolagus G. cf. andrewsi A leporid.

Mesonychia

Genus/family Species Notes/affinities Images
Harpagolestes H. alxaensis A mesonychid.

Perissodactyla

Genus/family Species Notes/affinities Images
"Amynodon" "A". alxaensis An amynodont. "A". alxaensis does not belong to the genus Amynodon, but its classification is pending re-examination of the fossil material.
Brontotheriidae Brontotheriidae indet. A brontothere
Embolotherium E. grangeri A brontothere
Paracadurcodon P. suhaituensis An amynodont.
Rhinocerotidae Rhinocerotidae indet. A rhinoceros
Sianodon S. sp. An amynodont.
Teleolophus T. magnus A deperetellid.
T. cf. medius

Rodentia

Genus/family Species Notes/affinities Images
Ctenodactylidae Ctenodactylidae gen. et sp. nov. A gundi.

Notes

  1. ↑ The Chaganbulage Formation was previously erroneously dated to the Early Oligocene, as its fauna was correlated with contemporaneous mammal faunas in North America then dated to the Oligocene. Following revisions of the North American land mammal ages in the 1990s, the Chaganbulage Formation was redated to the Eocene by Wang Banyue and Wang Peiyu in 1997.

References

  1. ↑ Wasiljeff, Joonas; Kaakinen, Anu; Salminen, Johanna M.; Zhang, Zhaoqun (2020). "Magnetostratigraphic constraints on the fossiliferous Ulantatal sequence in Inner Mongolia, China: Implications for Asian aridification and faunal turnover before the Eocene-Oligocene boundary". Earth and Planetary Science Letters. 535: 116125. doi:10.1016/j.epsl.2020.116125. ISSN 0012-821X.{{cite journal}}: CS1 maint: article number as page number (link)
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Wang, Banyue; Wang, Peiyu (1997). "Notes on the age of the Chaganbulage Formation in Haosibuldu Basin, Nei Mongol, China". Vertebrata PalAsiatica. 35 (2): 121–129.
  3. ↑ Bai, Bin; Li, Qian; Zhou, Xin-Ying; Wang, Xiao-Yang; Xu, Ran-Cheng; Zhang, Xin-Yue; Quan, Shuo-Shuo; Meng, Jin; Wang, Yuan-Qing (2025). "Litho- and Biostratigraphy of the East Mesa in Shara Murun Region of the Erlian Basin, Inner Mongolia, China, and the subdivision of the Ulangochuian Asian Land Mammal Age". American Museum Novitates (4034). doi:10.1206/4034.1. ISSN 0003-0082.
  4. ↑ Bai, Bin; Meng, Jin; Janis, Christine M.; Zhang, Zhao-Qun; Wang, Yuan-Qing (2020). "Perissodactyl diversities and responses to climate changes as reflected by dental homogeneity during the Cenozoic in Asia". Ecology and Evolution. 10 (13): 6333–6355. Bibcode:2020EcoEv..10.6333B. doi:10.1002/ece3.6363. ISSN 2045-7758. PMC 7381588. PMID 32724516.
  5. ↑ Wall, William P. (1982). "The Genus Amynodon and Its Relationship to Other Members of the Amynodontidae (Perissodactyla, Rhinocerotoidea)". Journal of Paleontology. 56 (2): 434–443. ISSN 0022-3360. JSTOR 1304471.
  6. ↑ Wang, Xiao-Yang; Wang, Yuang-Qing; Zhang, Rui; Zhang, Zhong-Hui; Liu, Xiao-Ling; Ren, Li-Ping (2020). "A new species of Amynodontopsis (Perissodactyla: Amynodontidae) from the Middle Eocene of Jiyuan, Henan, China". Vertebrata PalAsiatica. 58 (3). doi:10.19615/j.cnki.1000-3118.200313. ISSN 2096-9899.