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Title

Oligocene and early Miocene mammal biostratigraphy of the Valley of Lakes in Mongolia

AuthorsHarzhauser, M.; Daxner-Höck, G.; Erbajeva, M.A.; López-Guerrero, Paloma; Maridet, O.; Oliver Pérez, Adriana ; Piller, W.E.; Göhlich, U.B.; Ziegler, R.
KeywordsOligocene, Miocene, Mongolia, Mammals, Biozones
Issue DateMar-2017
PublisherSpringer
CitationPalaeobiodiversity and Palaeoenvironments 97(1): 219-231 (2017)
AbstractThe Taatsiin Gol Basin in Mongolia is a key area for understanding the evolution and dispersal of Central Asian mammal faunas during the Oligocene and early Miocene. After two decades of intense fieldwork, the area is extraordinarily well sampled and taxonomically well studied, yielding a large dataset of 19,042 specimens from 60 samples. The specimens represent 176 species-level and 99 genus-level taxa comprising 135 small mammal species and 47 large mammals. A detailed lithostratigraphy and new magnetostratigraphic and radiometric datings provide an excellent frame for these biotic data. Therefore, we test and evaluate the informal biozonation scheme that has been traditionally used for biostratigraphic correlations within the basin. Based on the analysis of the huge dataset, a formalised biostratigraphic scheme is proposed. It comprises the Cricetops dormitor Taxon Range Zone (Rupelian), subdivided into the Allosminthus khandae Taxon Range Subzone and the Huangomys frequens Abundance Subzone, the Amphechinus taatsiingolensis Abundance Zone (early Chattian), the Amphechinus major Taxon Range Zone (late Chattian), subdivided into the Yindirtemys deflexus Abundance Subzone and the Upper Amphechinus major T. R. Z., and the Tachyoryctoides kokonorensis Taxon Range Zone (Aquitanian). In statistical analyses, samples attributed to these biozones form distinct clusters, indicating that each biozone was also characterised by a distinct faunal type.
URIhttp://hdl.handle.net/10261/154913
DOI10.1007/s12549-016-0264-x
Identifiersdoi: 10.1007/s12549-016-0264-x
issn: 1867-1608
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