Eobaatar

Eobaatar; Temporal range: Aptian–Albian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	† Multituberculata
Family:	† Eobaataridae
Genus:	† Eobaatar ; Kielan-Jaworowska, Dashzeveg and Trofimov, 1987
Type species
	†Eobaatar magnus; Kielan-Jaworowska, Dashzeveg and Trofimov, 1987
Synonyms
	Eobataar (lapsus calami)

Last updated November 16, 2025

Eobaatar is a genus of extinct mammal from the Lower Cretaceous of Mongolia. A member of the also extinct order Multituberculata, it lies within the suborder Plagiaulacida and family Eobaataridae. The genus Eobaatar was named by Kielan-Jaworowska Z., Dashzeveg D. and Trofimov B.A. in 1987. Its name was made from Greek "eos" = "dawn" and Mongolian "baatar" = "hero"", "warrior".

Species

Five species have been described, but as of 2021 only the type species E. magnus is valid.^[1]

Eobaatar magnus

This species was named by Kielan-Jaworowska Z., Dashzeveg D. and Trofimov B.A. in 1987. It is based on a fragment of lower jaw with teeth found in Aptian or Albian (Lower Cretaceous) strata of the Dzunbain Formation in Guchin Us County, Mongolia.

"Eobaatar" hispanicus

This species was named by Hahn G. and Hahn R. in 1992. Remains consisting of a single tooth were found in Hauterivian - Barremian (Lower Cretaceous)-age strata of the Camarillas Formation, Spain. In 2021 review, it is considered as an eobaatarid but certainly not member of genus Eobaatar.^[1]

"Eobaatar" minor

This species was also named by Kielan-Jaworowska Z., Dashzeveg D. and Trofimov B.A. in 1987. Remains were found in Lower Cretaceous Dzunbain Formation of Mongolia. Going by the species name, it was probably relatively small. It got own genus Nokerbaatar in 2021.^[1]

"Eobaatar" pajaronensis

This species was named by Hahn G. and Hahn R. in 2001. Remains were discovered in Barremian (Lower Cretaceous) strata of the Camarillas Formation in Spain. 2021 review considered that known remains are not diagnostic and attribution to this genus is not confirmed.^[1]

"Eobaatar" clemensi

This species was named by Steven Sweetman in 2009. Remains were found in the Barremian (lower Cretaceous) of the Wessex formation, England. In 2021 review, it is considered as an eobaatarid but certainly not member of genus Eobaatar.^[1]

Sources

1 2 3 4 5 Lopatin, A. V.; Averianov, A. O. (2021). "Multituberculata from the Early Cretaceous of Mongolia". Paleontological Journal. 55 (11): 1275–1317. doi:10.1134/s0031030121110058. ISSN 0031-0301.

Zofia Kielan-Jaworowska, Richard L. Cifelli, and Zhe-Xi Luo (2004). "Mammals from the age of dinosaurs : origins, evolution, and structure" pp. 260–342. ISBN 0-231-11918-6
Hahn & Hahn (2001), "Multituberculaten-zähne aus der Unter-Kreide (Barremium) von Ple Pajaron (Prov. Cuenca, Spanien)". Paläontologische Zeitschrift74 (4), p. 587-589.
Kielan-Jaworowska et al. (1987), "Early Cretaceous multituberculates from Mongolia and a comparison with Late Jurassic form". Acta Palaeontologica Polonica32, p. 3-47.
Kielan-Jaworowska Z & Hurum JH (2001), "Phylogeny and Systematics of multituberculate mammals". Paleontology44, p. 389-429.
Much of this information has been derived from MESOZOIC MAMMALS: Plagiaulacidae, Albionbaataridae, Eobaataridae & Arginbaataridae
S. C. Sweetman. 2009. A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain. Acta Palaeontologica Polonica 54(3):373-384

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[:0-1] 1 2 3 4 5 Lopatin, A. V.; Averianov, A. O. (2021). "Multituberculata from the Early Cretaceous of Mongolia". Paleontological Journal. 55 (11): 1275–1317. doi:10.1134/s0031030121110058. ISSN 0031-0301.

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