Cynarctoides roii is an extinct species of Cynarctoides

Cynarctoides

Cynarctoides is an extinct genus of terrestrial canine of the family Borophaginae and tribe Phlaocyonini which inhabited most of North America during the Whitneyan stage of the Early Oligocene to the Barstovian stage of the Middle Miocene 33.3—13.6 Mya existing approximately .-Origin:Cynarctoides...

, belonging to the subfamily Borophaginae

Borophaginae

The subfamily Borophaginae is an extinct group of canids called "bone crushing dogs" that were endemic to North America during the Oligocene to Pliocene and lived roughly 36—2.5 million years ago and existing for approximately .-Origin:...

 and tribe Phlaocyonini

Phlaocyonini

Phlaocyonini † is a hypocarnivorous clade or tribe of Borophaginae. This is an extinct group of canids that were endemic to North America and which lived during the Oligocene epoch to the Miocene living ~33.3–5.3 Ma, existing for approximately . PhlaocyoniniThe clade includes Cynarctoides and...

, a canid which inhabited west central North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 from the Late Oligocene to Miocene

Miocene

The Miocene is a geological epoch of the Neogene Period and extends from about . The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words and and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene...

 living 30.8—20.6 mya

Anum

Anum is an Akan town in the Asuogyaman District of Eastern Ghana, across from the Volta Lake.an...

 and existed for approximately .

Taxonomy

Cynarctoides roii was named by Macdonald (1963). It was recombined as Cormocyon roii by Xiaoming Wang

Xiaoming Wang

Xiaoming Wang is a noted paleontologist and geologist born in People's Republic of China living in the United States.-Area of expertise:Dr. Wang specializes in the fossil evolution, systematics, and phylogeny of mammals of the Cenozoic...

 and Richard H. Tedford

Richard H. Tedford

Richard Hall Tedford was Curator Emeritus in the Department of Vertebrate Paleontology of the American Museum of Natural History in New York City, having been named as curator in 1969....

 (1992) and Wang and Fremd (1994); it was recombined as Cynarctoides roii by Wang et al. (1999).

Body mass

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

• Specimen 1 was estimated to weigh 0.644 kg (1.4 lb).
• Specimen 2 was estimated to weigh 0.7 kg (1.5 lb).

Fossil distribution

• Sharps Site, Shannon County, South Dakota
  Shannon County, South Dakota
  As of the census of 2000, there were 12,466 people, 2,785 households, and 2,353 families residing in the county. The population density was 6 people per square mile . There were 3,123 housing units at an average density of 2 per square mile...
  
   ~30.8—20.6 Ma.
• Horse Creek, Banner County, Nebraska
  Banner County, Nebraska
  Banner County is a county located in the U.S. state of Nebraska. The population was 690 at the 2010 census. Its county seat is Harrisburg.Banner County is part of the Scottsbluff, Nebraska Micropolitan Statistical Area....
  
  ~30.8—20.6 Ma.