Cynarctina is an extinct hypocarnivorous

Hypocarnivore

A hypocarnivore is an animal that consumes less than 30% meat for its diet, the majority of which consists of nonvertebrate foods that may include fungi, fruits, and other plant material...

 canine

Canidae

Canidae is the biological family of carnivorous and omnivorous mammals that includes wolves, foxes, jackals, coyotes, and domestic dogs. A member of this family is called a canid . The Canidae family is divided into two tribes: Canini and Vulpini...

 sub-tribe clade

Clade

A clade is a group consisting of a species and all its descendants. In the terms of biological systematics, a clade is a single "branch" on the "tree of life". The idea that such a "natural group" of organisms should be grouped together and given a taxonomic name is central to biological...

 of 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:...

(Bear-dog). Cynarctina lived during the Hemingfordian stage of Early Miocene

Early Miocene

The Early Miocene is a sub-epoch of the Miocene Epoch made up of two stages: the Aquitanian and Burdigalian stages....

 through Clarendonian

Clarendonian

The Clarendonian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology , typically set from 13,600,000 to 10,300,000 years BP, a period of . It is usually considered to overlap the Serravallian of the Middle...

 stage of the Middle Miocene

Middle Miocene

The Middle Miocene is a sub-epoch of the Miocene Epoch made up of two stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene....

 20.6—10.3 Ma, existing for approximately .

Taxonomy

Cynarctina was named by Wang et al. (1999). It was assigned to Borophagini by Wang et al. (1999).

Physical characteristics

Cynarctines feature the most dention having tubercles or rounded cusps on the molar teeth known among canids. Metatomarctus

Metatomarctus

Metatomarctus is an extinct genus of Borophaginae and a terrestrial canine which inhabited most of North America during the Early Hemingfordian stage of the Miocene epoch living 23.0—5.3 Mya, existing for approximately -Taxonomy:...

, Euoplocyon

Euoplocyon

Euoplocyon is an extinct genus of the Borophaginae and a small terrestrial canine which inhabited most of North America during the Hemingfordian stage of the Early Miocene subepoch through the Barstovian stage of the Middle Miocene subepoch living 20.6—13.6 Mya, existing for about...

, Psalidocyon

Psalidocyon

Psalidocyon is an extinct genus of the Borophaginae and a small terrestrial canine which inhabited most of North America during the Hemingfordian stage of the Early Miocene subepoch through the Barstovian stage of the Middle Miocene subepoch 20.6—13.6 Ma, existing for about ..-Morphology:Fossil...

, Microtomarctus

Microtomarctus

Microtomarctus is an extinct genus of the Borophaginae and a small terrestrial canine which inhabited most of North America during the Whitneyan stage of the Early Miocene subepoch through the Barstovian stage of the Middle Miocene subepoch.Microtomarctus existed for approximately .Like other...

, Protomarctus

Protomarctus

Protomarctus is an extinct member of the Borophaginae and a small terrestrial canine which inhabited most of North America during the Burdigalian stage of the Miocene epoch 20.4—15.9 Mya, existing for approximately .-Taxonomy:...

, and Tephrocyon

Tephrocyon

Tephrocyon is an extinct genus of the Borophaginae and a small to medium sized terrestrial canine which inhabited most of North America during the Barstovian stage of the Middle Miocene 16.3—13.6 Ma, existing for approximately .-Morphology:...

(the next series of taxa) are of medium size and occupy a sequence having projections resembling the teeth of a comb and have a rather diverse dentition

Dentition

Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, the characteristic arrangement, kind, and number of teeth in a given species at a given age...

. These include the most hypercarnivorous borophagine Euoplocyon

Euoplocyon

Euoplocyon is an extinct genus of the Borophaginae and a small terrestrial canine which inhabited most of North America during the Hemingfordian stage of the Early Miocene subepoch through the Barstovian stage of the Middle Miocene subepoch living 20.6—13.6 Mya, existing for about...

, the peculiarly distinct Psalidocyon

Psalidocyon

Psalidocyon is an extinct genus of the Borophaginae and a small terrestrial canine which inhabited most of North America during the Hemingfordian stage of the Early Miocene subepoch through the Barstovian stage of the Middle Miocene subepoch 20.6—13.6 Ma, existing for about ..-Morphology:Fossil...

, and the dwarf lineage Microtomarctus

Microtomarctus

Microtomarctus is an extinct genus of the Borophaginae and a small terrestrial canine which inhabited most of North America during the Whitneyan stage of the Early Miocene subepoch through the Barstovian stage of the Middle Miocene subepoch.Microtomarctus existed for approximately .Like other...

.