IVPP Loc. XJ200604: Shanwangian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Rodentia
- Aplodontidae
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Ansomys sp.
Qiu 1987
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Maridet et al. 2014 | |||||||||
new species | ||||||||||
Mammalia
- Rodentia
- Eomyidae
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Keramidomys sp.
Hartenberger 1966
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Maridet et al. 2014 | |||||||||
Asianeomys sp.
Wu et al. 2006
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Maridet et al. 2014 | |||||||||
Asianeomys aff. engesseri
Wu et al. 2006
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Maridet et al. 2014 | |||||||||
synonym of Asianeomys dangheensis | ||||||||||
Mammalia
- Rodentia
- Cricetidae
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Democricetodon sp.
Fahlbusch 1964
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Maridet et al. 2014 | |||||||||
Cricetodon sp.
Lartet 1851
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Maridet et al. 2014 | |||||||||
Primoprismus fejfari n. gen., n. sp.
Maridet et al. 2014
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Maridet et al. 2014 | |||||||||
Holotype: IVPP V18128, one left lower m2 | ||||||||||
Mammalia
- Rodentia
- Gliridae
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Eliomys sp.
Wagner 1840
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Maridet et al. 2014 | |||||||||
Microdyromys aff. orientalis
Wu 1986
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Maridet et al. 2014 | |||||||||
Miodyromys asiamediae
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Maridet et al. 2014 | |||||||||
Mammalia
- Rodentia
- Mylagaulidae
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Irtyshogaulus major n. sp.
Lu et al. 2016
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8 specimens | |||||||||
Irtyshogaulus minor n. gen., n. sp.
Lu et al. 2016
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15 specimens | |||||||||
see common names |
Geography
Country: | China | State/province: | Xinjiang |
Coordinates: | 46.7° North, 88.3° East (view map) | ||
Paleocoordinates: | 47.3° North, 87.7° East | ||
Basis of coordinate: | based on nearby landmark |
Time
Period: | Neogene | Epoch: | Miocene |
10 m.y. bin: | Cenozoic 5 | ||
Key time interval: | Shanwangian | ||
Age range of interval: | 16.90000 - 13.65000 m.y. ago |
Stratigraphy
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Maridet et al. 2014: The discovery of Asianeomys aff. engesseri and Microdyromys aff. orientalis confirms an Early Miocene age for the locality. However, while Asianeomys engesseri is known from the Suosuoquan Formation Zone II, dated to between 21.7 and 21.9 Ma based on paleomagnetostratigraphic data (Meng et al. 2006), Microdyromys orientalis is known from the late Early Miocene Shanwangian locality of Sihong, thus possibly suggesting a younger age for XJ200604. Paleomagnetostratigraphic and isotopic dating suggest that the Shanwang and Sihong localities are about the same age (Deng 2006), with basalts underlying the Shanwang Formation having been dated to 18.05 ± 0.55 Ma (Cheng and Peng 1985). Keramidomys sp. and the new species of Ansomys from XJ200604 also resemble specimens from Sihong (Qiu 1987) and Gashunyin’adege in Inner Mongolia (Qiu Zhuding, personal communication 2011), thus cor− roborating a middle Shanwangian age for XJ 200604 (Fig. 2). |
Lithology and environment
Primary lithology: | coarse,pebbly sandstone |
Includes fossils? | Y |
Lithology description: The sediments exposed at this locality belong to an unnamed rock unit consisting of grayish− to blackish−yellow fluvial sandstone and sandy mudstone. Mammalian fossils were discovered in a lens of pebbly coarse sandstone in the basal layer of these fluvial sediments, which overlies the brightly−coloured Irtysh River Formation (Ye et al. 2005) | |
Environment: | fluvial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | mesofossils |
Collection methods and comments
Reason for describing collection: | taxonomic analysis |
Museum repositories: | IVPP |
Taxonomic list comments:The rich and diverse small mammal fauna discovered at this locality includes isolated teeth belonging to Gliridae, Eomyidae, Cricetidae, Aplodontidae, Sciuridae, Mylagaulidae, Erinaecidae and Soricidae, and Lagomorpha. A preliminary study of the small mammals identified two lagomorphs, three glirids (Miodyromys asiamediae Maridet, Wu, Ye, Ni, and Meng, 2011c, Microdyromys aff. orientalis Wu, 1986, and one unidentified species of Eliomys), four eomyids (Asianeomys aff. engesseri Wu, 1986, Asianeomys sp., Keramidomys sp., and an unidentified eomyid), three cricetids (Democricetodon sp., Cricetodon sp., and the new microtoid cricetid reported here), and a new species of Ansomys. |
Metadata
Also known as: | Northwestern Junggar Basin, XJ 200604 | ||
Database number: | 197678 | ||
Authorizer: | P. Holroyd, P. Mannion | Enterer: | P. Holroyd, G. Varnham |
Modifier: | G. Varnham | Research group: | vertebrate |
Created: | 2018-11-22 00:40:15 | Last modified: | 2022-03-30 08:52:41 |
Access level: | the public | Released: | 2018-11-22 00:40:15 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
67402. | X. Lu, X. Ni, L. Li and Q. Li. 2016. Two New Mylagaulid Rodents from the Early Miocene of China. PLoS ONE 11( e0159445):1-17 [P. Holroyd/P. Holroyd] |
Secondary references:
81048 | O. Maridet, W. Wu, J. Yi, J. Meng, S. Bi and X. Ni. 2014. An Early Miocene microtoid cricetid rodent from the Junggar Basin of Xinjiang, China. Acta Palaeontologica Polonica 59(1):1-7 [P. Mannion/G. Varnham] |