| 词条 | Borophagus hilli |
| 释义 |
| name = Borophagus hilli[1] | fossil_range = Late Miocene-Early Pliocene (Hemphillian-Blancan) ~{{fossilrange|5.3|3.6}} | image = | image_caption = | genus = Borophagus | species = hilli | authority = C. S. Johnston 1939 | synonyms =
}}Borophagus hilli is an extinct species of the genus Borophagus of the subfamily Borophaginae, a group of canids endemic to North America from the Late Miocene until the Pliocene.[2] OverviewBorophagus hilli was named by C. S. Johnston in 1939.[3] Though not the most massive borophagine by size or weight, it had a more highly evolved capacity to crunch bone than earlier, larger genera such as Epicyon, which seems to be an evolutionary trend of the group (Turner, 2004). During the Pliocene epoch, Borophagus began being displaced by Canis genera such as Canis edwardii and later by Canis dirus. Early species of Borophagus were placed in the genus Osteoborus until recently, but the genera are now considered synonyms.[1] Borophagus hilli possibly led a hyena-like lifestyle scavenging carcasses of recently dead animals. TaxonomyTypical features of this genus are a bulging forehead and powerful jaws; it was probably a scavenger.[4] Its crushing premolar teeth and strong jaw muscles would have been used to crack open bone, much like the hyena of the Old World. The adult animal is estimated to have been about 80 cm in length, similar to a coyote, although it was much more powerfully built.[5] MorphologyTwo fossil specimens of Borophagus hilli were measured by Legendre and Roth for body mass.[6]
RecombinationBorophagus hilli was synonymized subjectively with Borophagus direptor by Kurten and Anderson in 1980 as well as synonymous with Osteoborus crassapineatus, Osteoborus progressus. It was recombined as Borophagus hilli by Xiaoming Wang et al. in 1999. Fossil distributionBorophagus hilli fossil specimens are widespread from east central Florida to southeastern Washington, from Idaho to New Mexico to Texas. Specimens were also found as far south as the Cuscatlán Formation of El Salvador.[7]References1. ^1 {{cite journal|last=Wang |first=Xiaoming |author2=Richard Tedford |author3=Beryl Taylor |title=Phylogenetic systematics of the Borophaginae |journal=Bulletin of the American Museum of Natural History |volume=243 |date=1999-11-17 |url=http://www.nhm.org/expeditions/rrc/wang/documents/Wangetal1999borophaginemonographpart1.pdf |accessdate=2007-07-08 |deadurl=yes |archiveurl=https://web.archive.org/web/20070320023028/http://www.nhm.org/expeditions/rrc/wang/documents/Wangetal1999borophaginemonographpart1.pdf |archivedate=2007-03-20 |df= }} 2. ^PaleoBiology Database: Borophagus dudleyi, basic info 3. ^C. S. Johnston. 1939. Journal of Paleontology 4. ^{{cite book |last=Lambert|first=David|year=1985 |title= The Field Guide to Prehistoric Life|publisher= Facts on File|location=New York|isbn= 0-8160-1125-7|page= 163}} 5. ^{{cite book |editor=Palmer, D.|year=1999 |title= The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals|publisher= Marshall Editions|location=London|isbn= 1-84028-152-9|page= 220}} 6. ^S. Legendre and C. Roth. 1988. Correlation of carnassial tooth size and body weight in recent carnivores (Mammalia). Historical Biology: p. 85-98 7. ^Río Tomayate at Fossilworks.org Further reading
External links
10 : Borophagines|Miocene canids|Pliocene carnivorans|Neogene mammals of North America|Blancan|Hemphillian|Fossils of El Salvador|Fossils of Mexico|Fossils of the United States|Fossil taxa described in 1939 |
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