Buginbaatar
genus of mammals (fossil)

Buginbaatar is an extinct genus of mammal from the Upper Cretaceous of Mongolia. It is a member of the extinct order Multituberculata, within the suborder Cimolodonta and family Cimolomyidae. It lived towards the end of the Mesozoic era.
The genus Buginbaatar was named by Kielan-Jaworowska Z. and Sochava A.V. in 1969 based on the remains of a single species. Remains of this species, dubbed Buginbaatar transaltaiensis, were found in Upper Cretaceous strata of the Nemegt Formation of Bügiyn Tsav in Mongolia.
Based on the dimensions of its teeth, Buginbaatar was slightly larger than Valenopsalis, which was estimated to weigh around 0.8–1 kilogram (1.8–2.2 lb), comparable to the extant Cynomys. It is the only Cretaceous Mongolian multituberculate not to belong to the family Djadochtatherioidea. Remains are incomplete and the assignment of Buginbaatar to the Cimolomyidae is tentative, (Kielan-Jaworowska & Hurum 2001, p. 408).
References
Kielan-Jaworowska & Sochava (1969), "The first multituberculate from the uppermost Cretaceous of the Gobi Desert (Mongolia)".
The public source identifies “Buginbaatar” as genus of mammals (fossil). This brief keeps that definition visible, then builds a research path around Buginbaatar, genus and mammals.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Apr 16, 2026. The linked authority identifier is Q18578827. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1969 and 2001.
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This entry incorporates text from “Buginbaatar” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.