Also known as Northwestern Junggar Basin, XJ 200604
Where: Xinjiang, China (46.7° N, 88.3° E: paleocoordinates 47.3° N, 87.7° E)
• coordinate based on nearby landmark
When: Shanwangian (16.9 - 13.7 Ma)
• 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).
• bed-level stratigraphic resolution
Environment/lithology: fluvial; coarse-grained, pebbly sandstone
Size class: mesofossils
Reposited in the IVPP
Primary reference: 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]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 197678: authorized by Patricia Holroyd, entered by Patricia Holroyd on 22.11.2018, edited by Grace Varnham
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
| |
Keramidomys sp. Hartenberger 1966 rodent
Asianeomys sp. Wu et al. 2006 rodent
"Asianeomys aff. engesseri" = Asianeomys dangheensis Wang 2002 rodent | |
Democricetodon sp. Fahlbusch 1964 mouse
Cricetodon sp. Lartet 1851 mouse
Primoprismus fejfari n. gen. n. sp. Maridet et al. 2014 mouse Holotype: IVPP V18128, one left lower m2
| |
Eliomys sp. Wagner 1840 dormouse
Microdyromys aff. orientalis Wu 1986 dormouse
Miodyromys asiamediae dormouse | |
Irtyshogaulus major n. sp., Irtyshogaulus minor n. gen. n. sp.
Irtyshogaulus major n. sp. Lu et al. 2016 rodent
Irtyshogaulus minor n. gen. n. sp. Lu et al. 2016 rodent |