Simplicidentata
| Simplicidentata Temporal range:
Early Paleocene to present | |
|---|---|
| |
| Marsh rice rat (Oryzomys palustris) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Grandorder: | Glires |
| Mirorder: | Simplicidentata Weber, 1904 |
| Orders | |
| |
Simplicidentata is a group of
synapomorphic (shared derived) feature of Simplicidentata.[3] The loss of the second upper premolar (P2) has also been considered as synapomorphic for Simplicidentata, but the primitive simplicidentate Sinomylus does have a P2.[4]
This sense of Simplicidentata was introduced by Chuankui Li and colleagues in 1987, who ranked Simplicidentata as a
macroscelideans, and some additional extinct groups). Within Simplicidentata, they recognized the orders Mixodontia (including only the extinct family Eurymylidae from the Paleocene and Eocene of Asia) and Rodentia.[6] McKenna and Bell's decision to use Simplicidentata was criticized by reviewer Frederick S. Szalay, who preferred to simply place the Mixodontia within Rodentia, which would leave Simplicidentata unnecessary.[7] In The Beginning of the Age of Mammals (2006), Kenneth Rose recognized a mirorder Simplicidentata, including Mixodontia, Rodentia, and the genus Sinomylus (not placed in either order), within the superorder Anagalida.[8]
References
Literature cited
- Landry, S.O., Jr. 1999. A proposal for a new classification and nomenclature for the Glires (Lagomorpha and Rodentia). Mitteilungen aus dem Museum für Naturkunde in Berlin, Zoologische Reihe 75(2):283–316.
- McKenna, M.C. and Bell, S.K. 1997. Classification of Mammals: Above the species level. New York: ISBN 978-0-231-11013-6
- McKenna, M.C. and Meng, J. 2001. A primitive relative of rodents from the Chinese Paleocene. Journal of Vertebrate Paleontology 21(3):565–572.
- Meng, J. and Wyss, A.R. 1994. Enamel microstructure of Tribosphenomys (Mammalia, Glires): Character analysis and systematic implications. Journal of Mammalian Evolution 2(3):185–203.
- Meng, J. and Wyss, A.R. 2001. The morphology of Tribosphenomys (Rodentiaformes, Mammalia): phylogenetic implications for basal Glires. Journal of Mammalian Evolution 8(1):1–71.
- Meng, J., Hu, Y. and Li, C. 2003. The osteology of Rhombomylus (Mammalia, Glires): implications for phylogeny and evolution of Glires. Bulletin of the American Museum of Natural History, 275:1–247.
- Meng, J., Kraatz, B.P., Wang, Y., Ni, X., Gebo, D.L. and Beard, K.C. 2009. A new species of Gomphos (Glires, Mammalia) from the Eocene of the Erlian Basin, Nei Mongol, China. American Museum Novitates 3670:1–11.
- Rose, K.D. 2006. The Beginning of the Age of Mammals. Baltimore: The ISBN 978-0-8018-8472-6
- Szalay, F.S. 1999. [Review of] Classification of Mammals: Above the Species Level (subscription required). Journal of Vertebrate Paleontology 19(1):191–195.