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Mesocyon Temporal range: Early Oligocene–Early Miocene PreЄ Є O S D C P T J K Pg N Skull of Mesocyon coryphaeus Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Canidae Subfamily: †Hesperocyoninae Genus: †Mesocyon Scott, 1890 Type species †Temnocyon coryphaeus Species †M. brachyops †M. coryphaeus †M. temnodon Range of Mesocyon in red Mesocyon is an extinct genus of terrestrial carnivore within the family Canidae, subfamily Hesperocyoninae, which inhabited North America from the Early Oligocene 33.9—20.6 Ma, existing for approximately 18 million years.[1] Though a carnivore, dentition suggests this animal was a hypercarnivore or mesocarnivore.[2][3] Contents 1 Taxonomy 2 Morphology 3 Fossil distribution 4 References Taxonomy Mesocyon was the most basal member of a clade that also includes the genera Cynodesmus, Sunkahetanka, Philotrox, and Enhydrocyon.[4] Mesocyon was named by Scott (1890). It was synonymized subjectively with Enhydrocyon by Swisher (1982). It was assigned to Canidae by Scott (1890), Carroll (1988) and Stevens (1991). Morphology Two specimens were examined by Legendre and Roth with the first specimen's mass being estimated at 7.4 kg (16.3 lbs). The second specimen's mass was estimated at 7.19 kg (15.8 lbs).[5] Fossil distribution Fossils were uncovered on 2 sites in north central Oregon. Also, 10 other sites from southern California[6] Colorado, southern Wyoming, and western Nebraska.[7] Palebiome illustration by John Day Paleo descriptive References ^ PaleoBiology Database: Mesocyon Taxonomy, Species ^ R. M. Nowak. 1991. Walker's Mammals of the World. Maryland, Johns Hopkins University Press (edited volume) II ^ Q. Ji, Z.-X. Luo, C.-X. J.R. Yuan Wible, J.-P. Zhang, and J.A. Georgi. 2002. The earliest known eutherian mammal. Nature 416:816-822 ^ Wang, X. 1994. Phylogenetic systematics of the Hesperocyoninae (Carnivora, Canidae). Bulletin of the American Museum of Natural History, 221:1-207. ^ S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology ^ Paleobiology Database: List of taxa; California ^ Paleobiology Database: List of taxa; Tremain, Wyoming v · d · eExtinct members of the family Canidae Kingdom: Animalia · Phylum: Chordata · Class: Mammalia · Order: Carnivora · Suborder: Caniformia †Hesperocyoninae Hesperocyon · Mesocyon · Cynodesmus · Sunkahetanka · Philotrox · Enhydrocyon · Paraenhydrocyon · Osbornodon · Caedocyon · Ectopocynus Borophaginae Archaeocyon · Borophagina · Borophagini · Oxetocyon · Otarocyon · Rhizocyon · Cynarctoides · Phlaocyon · Cormocyon · Desmocyon · Metatomarctus · Euoplocyon · Psalidocyon · Microtomarctus · Protomarctus · Tephrocyon · Paracynarctus · Cynarctus · Tomarctus · Aelurodon · Paratomarctus · Carpocyon · Protepicyon · Epicyon · Borophagus Caninae (extinct genera) Chailicyon · Cynotherium · Dusicyon · Eucyon · Gobicyon · Leptocyon · Neocynodesmus · Nurocyon · Prototocyon · Theriodictis · Xenocyon Caninae (extinct species and subspecies) Canis apolloniensis · Canis armbrusteri · Canis cedazoensis · Canis dirus · Canis edwardii · Canis ferox · Canis lepophagus · Canis lupus hattai · Canis lupus hodophilax Category This article related to prehistoric animals from order Carnivora is a stub. You can help Wikipedia by expanding it.v · d · e