Amphicynodon

Amphicynodon; Temporal range: Oligocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Suborder:	Caniformia
Superfamily:	Arctoidea
Family:	Ursidae
Subfamily:	†Amphicynodontinae
Genus:	†Amphicynodon; Filhol, 1881
Type species
	†Amphicynodon velaunus; Aymard, 1846
Species
	†A. mongoliensis (Janovskaja, 1970); †A. teilhardi (Matthew and Granger, 1924); †A. typicus (Schlosser, 1888); †A. chardini (Cirot and De Bonis, 1992); †A. cephalogalinus (Teilhard, 1915); †A. gracilis (Filhol, 1874); †A. crassirostris (Filhol, 1876); †A. brachyrostris (Filhol, 1876); †A. leptorhynchus (Filhol, 1874); †A. velaunus (Aymard, 1846);
Synonyms
	Cynodon (Aymard 1848)

Amphicynodon is an extinct genus of mammal of the family Ursidae, endemic to Europe and Asia during the Oligocene, living from ~33.9—28.4 Mya, existing for approximately 5.5 million years.

Amphicynodon is a small basal member of Ursidae similar to early Mustelids in both size and existence.

Taxonomy

Amphicynodon was named by Filhol (1881). It was assigned to Phocoidea by McKenna and Bell (1997) then to Ursidae by Filhol (1881) and Hunt (1998); and to Ursidae also by Wang et al. (2005).^[1]^[2]

Fossil distribution

Sites and specimen ages:

Ulaan Khongil, Mongolia ~33.9—28.4 Mya.
Ronzon site, Auvergne France ~33.9—28.4 Mya.^[3]

References

Rose, Kenneth David, The beginning of the age of mammals,The Johns Hopkins University Press (September 26, 2006)

^ M. C. McKenna and S. K. Bell. 1997. Classification of Mammals Above the Species Level 1-640
^ X. Wang, M. C. McKenna, and D. Dashzeveg. 2005. Amphicticeps and Amphicynodon (Arctoidea, Carnivora) from Hsanda Gol Formation, Central Mongolia and phylogeny of basal arctoids with comments on zoogeography. American Museum Novitates 3483:1-57
^ Paleobiolgy database: Ronzon collection

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[1] M. C. McKenna and S. K. Bell. 1997. Classification of Mammals Above the Species Level 1-640

[2] X. Wang, M. C. McKenna, and D. Dashzeveg. 2005. Amphicticeps and Amphicynodon (Arctoidea, Carnivora) from Hsanda Gol Formation, Central Mongolia and phylogeny of basal arctoids with comments on zoogeography. American Museum Novitates 3483:1-57

[3] Paleobiolgy database: Ronzon collection

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