| 词条 | Radinskya |
| 释义 |
| name = Radinskya[1] | fossil_range = {{Fossil range|Paleocene}} | image = | image_caption =lion, hedgehog | regnum = Animalia | phylum = Chordata | classis = Mammalia | subclassis = Theria | infraclassis = Eutheria | magnordo = Boreoeutheria | superordo = Laurasiatheria | unranked_genus = Fereuungulata Euungulata {{Harvnb|Waddell|Cao|Hauf|Hasegawa|1999}} | genus = {{Extinct}}Radinskya | genus_authority = {{Harvnb| McKenna|Chow|Ting|Luo|1989}} | subdivision_ranks = Species | subdivision =
}}Radinskya is an extinct perissodactyl-like mammal from the Paleocene of China (Nongshanian ALMA).[2][3] It is named after palaeontologist and perissodactyl expert Leonard Radinsky who died prematurely in 1985.[4] Before the discovery of Radinskya, palaeontologists speculated on an American origin for the tethythere-perissodactyl radiation that took place during the Paleocene-Eocene transition (around {{Mya|55}}). The primitive Radinskya from China made it clear that this radiation began in Asia during the Paleocene, from where it spread to North America, Europe, and Africa during the Eocene. With its enigmatic position at the base of this radiation, Radinskya is a member of the Chinese Paleocene fauna which includes primitive tethytheres such as Minchenella and the oldest arsinoitheres; it shares many characters with perissodactyls and some with phenacolophids, but is too primitive to be called either a horse, a rhino, or a tapir.[4] Radinskya is known only from a partial skull and upper dentition, which makes it difficult to assess its relationships to other fossils. {{Harvnb|Rose|2006}} described the upper molars as "quadrate with a rhomboid outline and a weak, π-shaped crown pattern formed by the incipient ectoloph, protoloph, and metaloph (crests on the crowns). This arrangement closely resembles the crown pattern of early perissodactyls, but the strong conules (cusps) and some other characters suggest relationship to phenacolophids" and added that "Radinskya may be the sister taxon of all other Altungulata or may be closer to the origin of Perissodactyla than is any phenacodontid."[5]Radinskya has also been included into the Embrithopoda, treated as an outgroup to perissodactyls.[6]Other Nongshanian phenacolophids include Yuelophus, Tienshanilophus, Ganolophus and the large form Minchenella.[2] Notes1. ^{{Cite web | title = Genus †Radinskya | publisher = The Taxonomicon | url = http://taxonomicon.taxonomy.nl/TaxonTree.aspx?id=108390&tree=0.1&syn=1 | accessdate = April 2013}} 2. ^1 {{Harvnb|Lucas|2001| pp=211–2}} 3. ^{{Harvnb|MacFadden|2005| p=539}} 4. ^1 {{Harvnb|Prothero|Schoch|2002| p=198}} 5. ^{{Harvnb|Rose|2006| pp=243–4}} 6. ^{{Harvnb|Prothero|Manning|Fischer|1988}} and {{Harvnb|Prothero|Schoch|1989| p=510}} References{{Refbegin|30em}}
|last = Lucas | first = Spencer G. | title = Chinese fossil vertebrates | year = 2001 | publisher = Columbia University Press |url = https://books.google.com/books?id=QYMZEz6AdpYC&pg=PA321 | accessdate = April 2013 | isbn = 9780231084833 | ref = harv}}
| last = MacFadden | first = Bruce J. | title = Evolution of Tertiary Mammals of North America: Terrestrial carnivores, ungulates, and ungulatelike mammals | volume = 1 | editor1-last = Janis | editor1-first = Christine Marie | editor2-last = Scott | editor2-first = Kathleen Marie | editor3-last = Jacobs | editor3-first = Louis L. | year = 2005 | publisher = Cambridge University Press | url = https://books.google.com/books?id=I-RgojcDyWYC&pg=PA539 | accessdate = April 2013 | isbn = 9780521355193 | ref = harv}}
| last1 = McKenna | first1 = M.C. | last2 = Chow | first2 = M. | last3 = Ting | first3 = S. | last4 = Luo | first4 = Z. | chapter = Radinskya yupingae, a perissodactyl-like mammal from the late Paleocene of China | pages = 24–36 | editor1-last = Prothero | editor1-first = D.R. | editor2-last = Schoch | editor2-first = R.M. | title = The evolution of perissodactyls | series = Oxford monographs on geology and geophysics | volume = 15 | year = 1989 | location = New York | publisher = Oxford University Press | isbn = 9780195060393 | oclc = 19268080 | ref = harv}}
| last1 = Prothero | first1 = Donald R. | last2 = Manning | first2 = Earl M. | last3 = Fischer | first3 = Martin | chapter = The phylogeny of the ungulates | chapter-url = http://www.donaldprothero.com/files/47440214.pdf | accessdate = April 2013 | title = The Phylogeny and Classification of the Tetrapods, Volume 2. Mammals | editor-last = Benton | editor-first = Michael J. | year = 1988 | publisher = Clarendon Press | location = Oxford | series = The Systematics Association Special Volume Series | volume = 35 | issue = 2 | pages = 201–34 | isbn = 9780198577126 | ref = harv}}
| last1 = Prothero | first1 = Donald R. | last2 = Schoch | first2 = Robert M. | chapter = The origin and evolution of perissodactyls: a summary and synthesis | pages = 504–529 | chapter-url = http://www.donaldprothero.com/files/47440280.pdf | accessdate = April 2013 | editor1-last = Prothero | editor1-first = D.R. | editor2-last = Schoch | editor2-first = R.M. | title = The evolution of perissodactyls | series = Oxford monographs on geology and geophysics | volume = 15 | year = 1989 | location = New York | publisher = Oxford University Press | isbn = 9780195060393 | oclc = 19268080 | ref = harv}}
| last1 = Prothero | first1 = Donald R. | last2 = Schoch | first2 = Robert M. | title = Horns, Tusks, and Flippers | year = 2002 | publisher = JHU Press | isbn = 9780801871351 | url = https://books.google.com/books?id=kWpQX-sfsLgC&pg=PA198 | accessdate = April 2013 | ref = harv}}
| last = Rose | first = Kenneth David | title = The beginning of the age of mammals | year = 2006 | publisher = JHU Press | location = Baltimore | url = https://books.google.com/books?id=3bs0D5ix4VAC&pg | isbn = 0801884721 | ref = harv}}
| last1 = Waddell | first1 = Peter J. | last2 = Cao | first2 = Ying | last3 = Hauf | first3 = Jöerg | last4 = Hasegawa | first4 = Masami | title = Using Novel Phylogenetic Methods to Evaluate Mammalian mtDNA, Including Amino Acid-Invariant Sites-LogDet plus Site Stripping, to Detect Internal Conflicts in the Data, with Special Reference to the Positions of Hedgehog, Armadillo, and Elephant | year = 1999 | journal = Systematic Biology | volume = 48 | issue = 1 | pages = 31–53 | url = http://sysbio.oxfordjournals.org/content/48/1/31.abstract | accessdate = April 2013 | doi = 10.1080/106351599260427 | ref = harv}}{{Refend}}{{Taxonbar|from=Q14565733}} 4 : Prehistoric odd-toed ungulates|Fossil taxa described in 1989|Paleocene mammals|Paleogene mammals of Asia |
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