| Eobaatarids Temporal range:
Early Cretaceous
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|---|---|
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| Fossil of Sinobaatar | |
Scientific classification
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | † Multituberculata |
| Suborder: | † Plagiaulacida |
| Family: | †
Eobaataridae Kielan-Jaworowska et al., 1987 |
| Genera | |
Eobaataridae is a family of fossil mammals within the order Multituberculata. Remains are known from the Lower Cretaceous of Europe and Asia. They are among the most derived representatives of the informal suborder " Plagiaulacida", and closely related to Cimolodonta. Most eobaatarids are only known from isolated teeth, though several reasonably complete members are known, including Sinobaatar and Jeholbaatar. The body of Sinobaatar is generalised, [3] while Jeholbaatar displays clear adaptations for scansoriality (climbing) due to its elongated digits. [4] Due to the morphology of the cheek teeth, Eobaatar and Jeholbaatar are inferred to be omnivorous, likely feeding on plants and invertebrates. [4]
Indobaatar from the Early Jurassic Kota Formation has been suggested to be the earliest known multituberculate, let alone the earliest eobaatarid, and may stretch the eobaatarid-cimolodontan group much earlier than previously thought. [5] However its referral to the family has been considered questionable by other scholars. [6] [7]
Fossils of Jeholbaatar kielanae seem to show that multituberculates independently acquired a middle ear from other mammal groups. [4]
Etymology
The name "Eobaatar" (from ancient Greek "ἠώς"= dawn and Mongolian "baatar"= hero) means "dawn hero".
Notes
- ^ Nao Kusuhashi; Yaoming Hu; Yuanqing Wang; Takeshi Setoguchi; Hiroshige Marsuoka (2010). "New multituberculate mammals from the Lower Cretaceous (Shahai and Fuxin formations), northeastern China". Journal of Vertebrate Paleontology. 30 (5): 1501–1514. doi: 10.1080/02724634.2010.501435. S2CID 128414107.
- ^ a b Nao Kusuhashi (2008). "Early Cretaceous multituberculate mammals from the Kuwajima Formation (Tetori Group), central Japan". Acta Palaeontologica Polonica. 53 (3): 379–390. doi: 10.4202/app.2008.0302.
- ^ Hu, Yaoming (2002). "Sinobaatar gen. nov.: First multituberculate from the Jehol Biota of Liaoning, Northeast China". Chinese Science Bulletin. 47 (11): 933. doi: 10.1360/02tb9209. ISSN 1001-6538. S2CID 198141629.
- ^ a b c Haibing Wang; Jin Meng; Yuanqing Wang (2019). "Cretaceous fossil reveals a new pattern in mammalian middle ear evolution". Nature. 576 (7785): 102–105. doi: 10.1038/s41586-019-1792-0. PMID 31776514. S2CID 208330587.
- ^ Parmar, Prasad, and Kumar (2013) The first multituberculate mammal from India. Naturwissenschaften
- ^ Kusuhashi, Nao; Wang, Yuan-Qing; Jin, Xun (2019-08-23). "A New Eobaatarid Multituberculate (Mammalia) from the Lower Cretaceous Fuxin Formation, Fuxin-Jinzhou Basin, Liaoning, Northeastern China". Journal of Mammalian Evolution. 27 (4): 605–623. doi: 10.1007/s10914-019-09481-w. ISSN 1064-7554. S2CID 201283262.
- ^ Averianov, Alexander; Lopatin, Alexey; Skutschas, Pavel; Ivantsov, Stepan; Boitsova, Elizaveta; Kuzmin, Ivan (2017). "An enigmatic multituberculate mammal from the Early Cretaceous of Siberia, Russia". Journal of Vertebrate Paleontology. 37 (2): e1293070. doi: 10.1080/02724634.2017.1293070. S2CID 90137175.
References
- Kielan-Jaworowska, Dashzeveg & Trofimov (1987), "Early Cretaceous multituberculates from Mongolia and a comparison with Late Jurassic forms". Acta Palaeontologica Polonica 32, p. 3-47.
- Kielan-Jaworowska, Z.; Hurum, J.H. (2001). "Phylogeny and Systematics of multituberculate mammals". Palaeontology. 44 (3): 389–429. doi: 10.1111/1475-4983.00185. S2CID 83592270.
External links
- Most of this information has been derived from MESOZOIC MAMMALS: Plagiaulacidae, Albionbaataridae, Eobaataridae & Arginbaataridae
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