| 词条 | Daphoenus |
| 释义 |
|name = Daphoenus |fossil_range = {{Fossil range|42|16.3}}Middle Eocene-Middle Miocene |regnum = Animalia | image = Daphoenus vetus skeleton.jpg | image_width = 250px | image_caption = D. vetus skeleton, Carnegie Museum of Natural History |phylum = Chordata |classis = Mammalia |ordo = Carnivora |familia = †Amphicyonidae |subfamilia = †Daphoeninae |genus = †Daphoenus |genus_authority = Leidy, 1853 |type_species = †Daphoenus vetus |subdivision_ranks = Species |subdivision =
|synonyms = *Pericyon
}}Daphoenus is an extinct genus of caniform carnivoran mammal of the family Amphicyonidae ("bear dogs") of the suborder Caniformia. Daphoenus inhabited North America from the Middle Eocene subepoch to the Middle Miocene subepoch 42—16.3 Mya, existing for approximately {{Mya|42-16.3|million years}}.[1] TaxonomyDaphoenus was named by Joseph Leidy (1853). Its type species was Daphoenus vetus. It was assigned to Amphicyonidae by Leidy (1853) and Carroll (1988); and to Daphoeninae by Hunt (1998) and Hunt (2002).[2]Amphicyonids are discussed in Robert M. Hunt's article Global Climate and the Evolution of Large Mammalian Carnivores during the Later Cenozoic in North America. D. Vetus was the largest of the species. D. hartshornianus, D. lambei (syn. D. demilo), D. ruber, D. socialis, D. transversus, D. vetus (syn. Proamphicyon nebrascensis) Daphoenus hartshornianus was named by Cope (1873). It was recombined as Protemnocyon hartshornianus by Hatcher (1902); it was recombined as Daphoenus hartshornianus by Scott (1898), Sinclair (1924), Scott and Jepsen (1936), Galbreath (1953) and Hunt (1996).[3][4][5] A single specimen was measured by Legendre and Roth in 1988 for estimated body mass.[6] {{Convert|6.79|kg|lb|abbr=on|sigfig=2}}. Daphoenus hartshornianus fossils found in Oligocene Orellan rocks in the Lower Nodular Zone, Pennington County, South Dakota are dated at ~33.4 Ma. Other sites include the Prairie Dog Creek Site and Warbonnet Creek Site, Sioux County, Nebraska ~33.4 Ma., Bartlett High Site, Dawes County, Nebraska ~33.2 Ma., Babby Butte Site, Oglala Lakota County, South Dakota ~33.4 Ma—33.2 Ma. Daphoenus lambei fossils found in Eocene Duchesnean rocks at the Big Red Horizon Site, Presidio County, Texas are dated at ~38.4—38.3 Ma. Other sites include the Badwater Locality 20 Site and Wood Locality Site, Natrona County, Wyoming ~41.8 Ma., Lac Pelletier Lower Fauna Site, Saskatchewan ~42.3 Ma. A single specimen was measured by Legendre and Roth in 1988 for estimated body mass. {{Convert|4.84|kg|lb|abbr=on|sigfig=2}}.[6]Paradaphoenus transversus was named by Wortman and Matthew (1899). Its type specimen is AMNH 6851, a maxilla (rostrum), and it is not a trace fossil. It was recombined as Daphoenus transversus by Hunt (1998).[6]Daphoenus ruber was named by Stock (1932). Its type locality is Tecuya Canyon, California.[7] A single specimen was measured by Legendre and Roth in 1988 for estimated body mass. {{Convert|5.94|kg|lb|abbr=on|sigfig=2}}.[6] Daphoenus ruber fossils were found in Oligocene Arikareean rocks in the Tecuya Canyon Formation of Kern County, California with other mammal species and are dated at ~29.8—24.8 Ma. Daphoenus socialis was originally desinagnated as Pericyon socialis and named by Thorpe (1922) a genotype.[8] It is the type species of Pericyon. It was recombined as Daphoenus socialis by Hunt in 1998.[6] A single specimen was measured by Legendre and Roth in 1988 for estimated body mass.[6] {{Convert|13|kg|lb|abbr=on|sigfig=2}}. Daphoenus socialis fossils found in Oligocene Hemingfordian rocks at the Haystack Member, Wheeler County, Oregon are dated at ~24.3 Ma. and Kimberly Member, Grant County, Oregon with several other species of mammal such as Hesperocyon, Hypertragulus, and Leptomeryx dating ~25.4—25.3 Ma. DescriptionA single specimen was measured by Legendre and Roth in 1988 for estimated body mass.[9]
DistributionDaphoenus fossils found in late Oligocene rocks in the Great Plains are dated at ~28 Ma. Daphoenus survived to 27 Ma in the Pacific Northwest in the John Day beds of Oregon.[11] Other sites include: Alachua County, Florida (Whitneyan) estimated at 31.1—24.3 Ma., Tecuya Canyon, California (Arikareean age) 30.8—20.6 Ma., Haystack Member Formation, Wheeler County, Oregon (Hemingfordian) 20.6—16.3 Ma., Lac Pelletier, Alberta, Canada (Duchesnean) ~42 Ma. References1. ^Paleobiology Database: Daphoenus, age range and collections {{Portal|Paleontology}}{{Taxonbar|from=Q3702459}}2. ^R. M. Hunt. 2002. New amphicyonid carnivorans (Mammalia, Daphoeninae) from the early Miocene of southeastern Wyoming. American Museum Novitates 3385:1-41 3. ^W. B. Scott. 1898. Proceedings of the American Philosophical Society 37(157):73-81 4. ^W. J. Sinclair. 1924. Proceedings of the American Philosophical Society 63 5. ^R. M. Hunt. 1996. 476-485 6. ^1 R. M. Hunt. 1998. Amphicyonidae. 196-227 7. ^C. Stock. 1932. Carnegie Institution of Washington Publication 418(4) 8. ^M. R. Thorpe. 1922. American Journal of Science 203 9. ^1 2 3 4 S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology 10. ^Robbins, Neal. "Daphoenus- A Mammal of the Oligocene" Infohub.com. 4thMar.2007.Web. 12 Nov. 2009 11. ^{{cite book |chapter=Global Climate and the Evolution of Large Mammalian Carnivores during the Later Cenozoic in North America |title=Cenozoic Carnivores and Global Climate |last=Hunt |first=Robert M., Jr. |authorlink= |coauthors= |year=2004 |publisher= |location= |isbn= |pages= |chapterurl=http://digitallibrary.amnh.org/dspace/bitstream/2246/453/8/B285a11.pdf }} 8 : Bear dogs|Oligocene caniforms|Burdigalian extinctions|Prehistoric mammals of North America|White River Fauna|Miocene carnivorans|Eocene genus first appearances|Fossil taxa described in 1853 |
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