| 词条 | Subhyracodon |
| 释义 |
|name = Subhyracodon |image = Subhyracodon occidentalis.jpg |image_width = 240px |image_caption = Subhyracodon occidentalis skeleton |fossil_range = Late Eocene to Late Oligocene, {{fossil range|38.0|26.3}} [1] |regnum = Animalia |phylum = Chordata |classis = Mammalia |ordo = Perissodactyla |familia = Rhinocerotidae |genus = †Subhyracodon |genus_authority = (Brandt, 1878) |type_species = †Rhinoceros occidentalis |subdivision_ranks = Species[2] |subdivision =
|synonyms =
}}Subhyracodon is an extinct genus of cow-sized rhinoceroses. With a length of 2.4 m (8 ft) and a weight estimated of 381.3 kg (in S. mitis), it was a tapir-sized herbivore on the plains of early Oligocene South Dakota 33 million years ago (White River Fauna), smaller than only the Megacerops and the chalicotheres.[7] Subhyracodon had no horns, relying more on its speed to escape, but a species found at Wind Cave National Park had a pair of bony nasal ridges. The genus Caenopus and species originally referred toAceratherium were synonymized into Subhyracodon[8] See also
References1. ^Prothero, 2005, p. 41. 2. ^Prothero, 2005, pp. 40-47. 3. ^McKenna & Bell, 1997, p. 481. 4. ^Prothero, 2005, p. 43. 5. ^Prothero, 2005, p. 43. 6. ^Prothero, 2005, p. 43. 7. ^{{cite web |url=http://museumu03.museumwww.naturkundemuseum-berlin.de/cgi-bin/bridge.pl?a=basicTaxonInfo&taxon_no=51872 |title=Archived copy |accessdate=2012-05-29 |deadurl=yes |archiveurl=https://archive.is/20120710123608/http://museumu03.museumwww.naturkundemuseum-berlin.de/cgi-bin/bridge.pl?a=basicTaxonInfo&taxon_no=51872 |archivedate=2012-07-10 |df= }} 8. ^{{cite book|author=C.C. O'Harra|year=1920|title=The White River Badlands|publisher=South Dakota School of Mines|location=Rapid City, SD|pages=181}} External links
5 : Eocene rhinoceroses|Chattian genus extinctions|Oligocene rhinoceroses|White River Fauna|Oligocene |
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