Sabtu, 09 Mei 2015

Indarctos is a genus of mammals of the bear family Ursidae, endemic to North America, Europe, Africa, and Asia during the Miocene. It was present from ~11.1 to 5.3 Ma, existing for approximately 6.2 million years.

The oldest member is from Arizona (~11.1â€"7.7 Ma) and youngest is (~9.0â€"5.3 Ma) from Kazakhstan. In North America this animal was contemporary with Plionarctos (~10.3â€"3.3 Ma).



Indarctos was named by Pilgrim (1913) Its type is Indarctos salmontanus. It was assigned to Agriotheriini by Chorn and Hoffman (1978); to Ursavini by Hunt (1998); and to Ursidae by Pilgrim (1913), Carroll (1988) and Salesa et al. (2006).



Body mass

Two specimens were examined by Legendre and Roth for body mass.

  • Specimen 1 estimated to weigh:244 kg

Fossil distribution


Sites and specimen ages:

  • Box T Site, Lipscomb County, Texas ~9.3â€"9.2 Ma.
  • Rattlesnake site, Grant County, Oregon ~10.3â€"4.9 Ma.
  • Withlacoochee River Site 4A, Marion County, Florida paleontological sites (Indarctos sp.) ~10.3â€"4.9 Ma.
  • Lufeng, Yunnan, China (I. atticus) ~9â€"5.3 Ma.
  • Yulafli (CY), Thrace, Turkey (I. arctoides) ~9.7â€"8.7 Ma.
  • Batallones-3 site, Madrid Basin, Spain (I. arctoides) ~11.6â€"5.3 Ma.


  • I. nevadensis, and I. oregonensis are of North America with fossil recovery in Oregon and Nevada, USA
  • Indarctos salmontanus (Pilgrim, 1913) is the species type originating in Calcutta, India and discovered by the Geological Survey of India.



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