IVPP Loc. XJ200604: Shanwangian, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Rodentia - Aplodontidae
Ansomys sp. Qiu 1987
Maridet et al. 2014
new species
Mammalia - Rodentia - Eomyidae
Keramidomys sp. Hartenberger 1966
Maridet et al. 2014
Asianeomys sp. Wu et al. 2006
Maridet et al. 2014
Asianeomys aff. engesseri Wu et al. 2006
Maridet et al. 2014
synonym of Asianeomys dangheensis
Mammalia - Rodentia - Cricetidae
Democricetodon sp. Fahlbusch 1964
Maridet et al. 2014
Cricetodon sp. Lartet 1851
Maridet et al. 2014
Primoprismus fejfari n. gen., n. sp. Maridet et al. 2014
Maridet et al. 2014
Holotype: IVPP V18128, one left lower m2
Mammalia - Rodentia - Gliridae
Eliomys sp. Wagner 1840
Maridet et al. 2014
Microdyromys aff. orientalis Wu 1986
Maridet et al. 2014
Miodyromys asiamediae
Maridet et al. 2014
Mammalia - Rodentia - Mylagaulidae
Irtyshogaulus major n. sp. Lu et al. 2016
8 specimens
Irtyshogaulus minor n. gen., n. sp. Lu et al. 2016
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]