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The Gashatan (late Paleocene) mammal fauna from Subeng, Inner Mongolia, China

(2008) Acta Palaeontologica Polonica. 53(3). p.357-378
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Abstract
The Paleocene–Eocene boundary is of particular importance for the evolution of mammals and the poorly known Asian mammal faunas from this period have received much attention. The late Paleocene Subeng site in Inner Mongolia (China) has come under study only recently, and here we present the first complete description of its mammal fauna. Two new species are described, the neoplagiaulacid multituberculate Mesodmops tenuis sp. nov. and the praolestine nyctitheriid Bumbanius ningi sp. nov., representing stratigraphic range extensions of the respective genera into the Paleocene. Previ− ously unknown parts of the dentition are described here for the eurymylid Eomylus bayanulanensis, the sarcodontid Hyracolestes ermineus, the cimolestid Tsaganius ambiguus, the carpolestid Subengius mengi, as well as the femur of the mesonychid Dissacus serratus. For most taxa, the new specimens from Subeng provide new phylogenetic and/or biostratigraphic information. We confirm the inclusion of Hyracolestes in the Sarcodontinae and elevate this group to the rank of family, the Sarcodontidae, separate from Micropternodontidae. In the case of Subengius mengi an updated cladistic analysis of carpolestids supports the hypothesis that Subengius is derived from an evolved Elphidotarsius−like ancestor in the early to middle Tiffanian of North America. A total of 17 species is identified, including well−known biostratigraphic markers for the late Paleocene Gashatan Asian Land Mammal Age such as Lambdopsalis bulla, Prionessus sp., Palaeostylops iturus, Pseudictops lophiodon, Tribosphenomys minutus, and Dissacus serratus.We pro− pose that the Gashatan faunas are less endemic than previously thought, and result from a significant exchange with North American faunas from the late Paleocene.
Keywords
Mammalia, “Insectivora”, Multituberculata, Glires, Carpolestidae, Gashatan, late Paleocene, Subeng, China

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Citation

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MLA
Missiaen, Pieter, and T. Smith. “The Gashatan (late Paleocene) Mammal Fauna from Subeng, Inner Mongolia, China.” Acta Palaeontologica Polonica 53.3 (2008): 357–378. Print.
APA
Missiaen, P., & Smith, T. (2008). The Gashatan (late Paleocene) mammal fauna from Subeng, Inner Mongolia, China. Acta Palaeontologica Polonica, 53(3), 357–378.
Chicago author-date
Missiaen, Pieter, and T. Smith. 2008. “The Gashatan (late Paleocene) Mammal Fauna from Subeng, Inner Mongolia, China.” Acta Palaeontologica Polonica 53 (3): 357–378.
Chicago author-date (all authors)
Missiaen, Pieter, and T. Smith. 2008. “The Gashatan (late Paleocene) Mammal Fauna from Subeng, Inner Mongolia, China.” Acta Palaeontologica Polonica 53 (3): 357–378.
Vancouver
1.
Missiaen P, Smith T. The Gashatan (late Paleocene) mammal fauna from Subeng, Inner Mongolia, China. Acta Palaeontologica Polonica. 2008;53(3):357–78.
IEEE
[1]
P. Missiaen and T. Smith, “The Gashatan (late Paleocene) mammal fauna from Subeng, Inner Mongolia, China,” Acta Palaeontologica Polonica, vol. 53, no. 3, pp. 357–378, 2008.
@article{482260,
  abstract     = {The Paleocene–Eocene boundary is of particular importance for the evolution of mammals and the poorly known Asian
mammal faunas from this period have received much attention. The late Paleocene Subeng site in Inner Mongolia (China)
has come under study only recently, and here we present the first complete description of its mammal fauna. Two new
species are described, the neoplagiaulacid multituberculate Mesodmops tenuis sp. nov. and the praolestine nyctitheriid
Bumbanius ningi sp. nov., representing stratigraphic range extensions of the respective genera into the Paleocene. Previ−
ously unknown parts of the dentition are described here for the eurymylid Eomylus bayanulanensis, the sarcodontid
Hyracolestes ermineus, the cimolestid Tsaganius ambiguus, the carpolestid Subengius mengi, as well as the femur of the
mesonychid Dissacus serratus. For most taxa, the new specimens from Subeng provide new phylogenetic and/or
biostratigraphic information. We confirm the inclusion of Hyracolestes in the Sarcodontinae and elevate this group to the
rank of family, the Sarcodontidae, separate from Micropternodontidae. In the case of Subengius mengi an updated
cladistic analysis of carpolestids supports the hypothesis that Subengius is derived from an evolved Elphidotarsius−like
ancestor in the early to middle Tiffanian of North America. A total of 17 species is identified, including well−known
biostratigraphic markers for the late Paleocene Gashatan Asian Land Mammal Age such as Lambdopsalis bulla,
Prionessus sp., Palaeostylops iturus, Pseudictops lophiodon, Tribosphenomys minutus, and Dissacus serratus.We pro−
pose that the Gashatan faunas are less endemic than previously thought, and result from a significant exchange with North
American faunas from the late Paleocene.},
  author       = {Missiaen, Pieter and Smith, T.},
  issn         = {1732-2421},
  journal      = {Acta Palaeontologica Polonica},
  keywords     = {Mammalia,“Insectivora”,Multituberculata,Glires,Carpolestidae,Gashatan,late Paleocene,Subeng,China},
  language     = {eng},
  number       = {3},
  pages        = {357--378},
  title        = {The Gashatan (late Paleocene) mammal fauna from Subeng, Inner Mongolia, China},
  url          = {http://app.pan.pl/acta53/app53%E2%88%92357.pdf},
  volume       = {53},
  year         = {2008},
}

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