Oxetocyon: Difference between revisions
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{{Short description|Extinct genus of carnivores}} |
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{{Speciesbox |
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{{Taxobox |
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| name = ''Oxetocyon'' |
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| fossil_range = {{Fossil range|Early Oligocene|Late Oligocene}} |
| fossil_range = {{Fossil range|Early Oligocene|Late Oligocene}} |
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| display_parents = 2 |
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| regnum = [[Animal]]ia |
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| genus = Oxetocyon |
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| classis = [[Mammal]]ia |
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| ordo = [[Carnivora]] |
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| familia = [[Canidae]] |
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| subfamilia = †[[Borophaginae]] |
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| genus = †'''''Oxetocyon''''' |
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| binomial = †''Oxetocyon cuspidatus'' |
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| range_map = Oxetocyon range.png |
| range_map = Oxetocyon range.png |
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| range_map_caption = Range of ''Oxetocyon'' based on fossil distribution |
| range_map_caption = Range of ''Oxetocyon'' based on fossil distribution |
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| ⚫ | '''''Oxetocyon''''' ("beginning dog") is an extinct genus of the |
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| ⚫ | '''''Oxetocyon''''' ("beginning dog") is an extinct [[monotypic taxon|monospecific]] genus of the [[Borophaginae]] subfamily of [[canid]]s native to [[North America]]. It lived during the Early [[Oligocene]] epoch,<ref>[http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=41229&is_real_user=1 PaleoBiology Database: ''Oxetocyon'' Taxonomy, Species]</ref> existing for approximately {{Mya|33.3-30.8|million years}}. Fossils have been found in [[Nebraska]] and [[South Dakota]]. |
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==Taxonomy== |
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| ⚫ | The teeth of ''Oxetocyon'' indicate a |
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| ⚫ | Fossils of ''Oxetocyon'' are rare and, as a result, the [[genus]] is poorly known, and only the [[teeth]], [[dentary|dentaries]], and a fragmentary [[skull]] have been reported. The teeth of ''Oxetocyon'' indicate a [[Hypocarnivore|hypocarnivorous]] diet, as is found in the living [[raccoon dog]], and suggest a potential relationship to the unusual borophagine ''[[Otarocyon]]''. ''Oxetocyon'' is distinguished from ''Otarocyon'' by its own set of [[dentition|dental]] specializations for an omnivorous diet, particularly by the presence of a cleft that divides each upper [[Molar (tooth)|molar]] into front and back halves.<ref>Xiaoming Wang, R.H. Tedford, and B.E. Taylor. 1999. [http://www.nhm.org/expeditions/rrc/wang/documents/Wangetal1999borophaginemonographpart1.pdf Phylogenetic systematics of the Borophaginae]</ref> |
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==Morphology== |
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Fossil specimens of two individuals' body mass were examined by Legendre and Roth. The first specimen was estimated to weigh 1.04 kg (2.29 lbs). The second specimen was estimated to weigh 1.1 kg (2.44 lbs).<ref>S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology</ref><ref>[http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=41229&is_real_user=1 Paleobiology Database: ''Oxetocyon'' (see Morphology)]</ref> |
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==References== |
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{{Reflist}} |
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Only a single species, '''''O. cuspidatus''''', is known. Fossils of ''Oxetocyon'' are rare and, as a result, the [[genus]] is poorly known, and only the [[teeth]], [[dentary|dentaries]], and a fragmentary [[skull]] have been reported. |
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==Sister genera== |
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{{Taxonbar|from=Q16952940}} |
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''[[Archaeocyon]]'', ''[[Otarocyon]]'', and ''[[Rhizocyon]]''. |
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==Fossil distribution== |
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* Roundhouse Rock, [[Brule Formation]], [[Morrill County, Nebraska]] ~33.3—30.8 Ma. |
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* UNSM Sx-28, Brule Formation, [[Sioux County, Nebraska]] ~33.3—30.8 Ma. |
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* Brule Formation, [[Oglala Lakota County, South Dakota]] ~33.3—30.8 Ma. |
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[[Category:Fossil taxa described in 1954]] |
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* Harris Ranch Unit C, Brule Formation, [[Fall River County, South Dakota]] ~33.3—30.8 Ma. |
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== References == |
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{{reflist}} |
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{{paleo-carnivora-stub}} |
{{paleo-carnivora-stub}} |
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Latest revision as of 21:20, 19 March 2023
| Oxetocyon Temporal range:
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Carnivora |
| Family: | Canidae |
| Subfamily: | †Borophaginae |
| Genus: | †Oxetocyon Green, 1954 |
| Species: | †O. cuspidatus
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| Binomial name | |
| †Oxetocyon cuspidatus Green, 1954
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| Range of Oxetocyon based on fossil distribution | |
Oxetocyon ("beginning dog") is an extinct monospecific genus of the Borophaginae subfamily of canids native to North America. It lived during the Early Oligocene epoch,[1] existing for approximately 2.5 million years. Fossils have been found in Nebraska and South Dakota.
Fossils of Oxetocyon are rare and, as a result, the genus is poorly known, and only the teeth, dentaries, and a fragmentary skull have been reported. The teeth of Oxetocyon indicate a hypocarnivorous diet, as is found in the living raccoon dog, and suggest a potential relationship to the unusual borophagine Otarocyon. Oxetocyon is distinguished from Otarocyon by its own set of dental specializations for an omnivorous diet, particularly by the presence of a cleft that divides each upper molar into front and back halves.[2]
References[edit]
- ^ PaleoBiology Database: Oxetocyon Taxonomy, Species
- ^ Xiaoming Wang, R.H. Tedford, and B.E. Taylor. 1999. Phylogenetic systematics of the Borophaginae
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