Eurymylidae Temporal range:Early Paleocene–Middle Eocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	incertae sedis
Family:	†Eurymylidae Matthew,Granger, &Simpson, 1929[1]
Genera[2]
†Eurymylinae †Eurymylus †Heomys †Hypsimylinae †Khaychininae †Matutinia †Rhombomylus †Taizimylus †Zagmyinae

Eurymylidae is afamily ofextinctsimplicidentates. Most authorities consider them to bebasal to all modernrodents and may have been the ancestral stock whence the most recent common ancestor of all modern rodents (crown rodents) arose. However, the more completely known eurymylids, includingEurymylus,Heomys,Matutinia, andRhombomylus, appear to represent amonophyletic side branch not directly ancestral to rodents (Meng et al., 2003). Huang et al. (2004) have argued thatHanomys,Matutinia, andRhombomylus form a clade characterized by distinctive features of the skull and dentition that should be recognized as a separate family,Rhombomylidae. Eurymylids are only known fromAsia.

Modified from McKenna and Bell (1997) following generic taxonomy of Ting et al. (2002) and Huang et al. (2004)

• MirorderSimplicidentata – simplicidentates
  • Family †Eurymylidae
    • †Heomys
    • †Zagmys
    • †Nikolomylus
    • Subfamily †Eurymylinae
      • †Kazygurtia
      • †Eomylus
      • †Eurymylus
      • †Amar
      • †Hanomys
      • †Rhombomylus
      • †Matutinia
      • †Decipomys
    • Subfamily †Khaychininae
      • †Khaychina
  • OrderRodentia –crown rodents (including all extant rodents)

• Huang, X., C. Li, M.R. Dawson, and L. Liu, 2003.Hanomys malcolmi, a new simplicidentate mammal from the Paleocene of central China: its relationships and stratigraphic implicationsBulletin of Carnegie Museum of Natural History 36(1):81–89.
• McKenna, Malcolm C.; Bell, Susan K. (1997).Classification of Mammals: Above the Species Level. Columbia University Press.ISBN 0-231-11013-8.
• Meng, Jin; Hu, Yaoming; Li, Chuan-Kuei (2003)."The osteology ofRhombomylus (Mammalia, Glires) : Implications for phylogeny and evolution of Glires. Bulletin of the AMNH ; no. 275".hdl:2246/442.
• Ting, Su-Yin; Meng, Jin (Paleontologist); McKenna, Malcolm C.; Li, Chuan-Kuei (2002)."The osteology ofMatutinia (Simplicidentata, Mammalia) and its relationship toRhombomylus. American Museum novitates ; no. 3371".hdl:2246/2860.

• R. J. Asher, J. Meng, J. R. Wible, M. C. McKenna, G. W. Rougier, D. Dashzeveg, and M. J. Novacek. 2005. Stem lagomorpha and the antiquity of Glires. Science 307:1091–1094
• R. L. Carroll. 1988. Vertebrate Paleontology and Evolution 1–698
• D. Dashzeveg and D. E. Russell. 1988. Palaeocene and Eocene Mixodontia (Mammalia, Glires) of Mongolia and China. Palaeontology 31(1):129–164
• C. Li. 1977. Paleocene eurymyloids (Anagalida, Mammalia) of Qianshan Anhui. Vertebrata PalAsiatica 15:103–118
• F. S. Szalay and Malcolm C. McKenna. 1971. Beginning of the Age of Mammals in Asia: the Late Paleocene Gashato fauna, Mongolia. Bulletin of the American Museum of Natural History 144(4):269–318

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