| 词条 | Regisaurus |
| 释义 |
| name = Regisaurus | fossil_range = {{Fossil range|Late Permian|Early Triassic}} | image = Regisaurus skull.jpg | image_width = | image_caption = Skull cast seen from below, Museum of Evolution of Polish Academy of Sciences, Warsaw | regnum = Animalia | phylum = Chordata | classis = Synapsida | ordo = Therapsida | subordo = Therocephalia | familia = Regisauridae | genus = Regisaurus | subdivision_ranks = Species | subdivision =
}}Regisaurus ("Rex's lizard", named after its discoverer Francis Rex Parrington) is an extinct Genus of small carnivorous therocephalian. It is known from a single described species, the type species Regisaurus jacobi, from the Early Triassic Lystrosaurus Assemblage Zone of South Africa, although at least one undescribed species is also known.[1] DescriptionIt was a rather derived baurioid, with a robust skull, short tail, long limbs and relatively large canines. It was apparently related to Urumchia and like Urumchia, it had vomer bones, which form the secondary palate, but they do not narrow to a tip like in Urumchia. However, it retained some primitive characteristics. It had six incisor teeth in each side of the jaw, whereas other baurioids had less.[2] It was probably carnivorous, and ate insects and small vertebrates Discovery and SpeciesRegisaurus was discovered in 1964 by Francis Rex Parrington and it was named in 1972 by C. H. Mendrez. Two species are known, the type species Regisaurus jacobi and an additional undescribed species. R. jacobi is known from the holotype FRP 1964/27 and the referred specimen BP/1/3973,[3] while the undescribed species is known only from the Holotype T837.[4][5]ClassificationBelow is a cladogram modified from Sidor (2001) and Huttenlocker (2009):[6][7] {{clade| style=font-size:85%;line-height:85%|label1=Baurioidea |1={{clade |1=Ictidosuchops rubidgei |label2=Ictidosuchidae |2={{clade |1=Ictidosuchus primaevus |2=Ictidosuchoides longiceps}} |3={{clade |label1=Regisauridae |1={{clade |1=Regisaurus jacobi |2=Urumchia lii}} |2={{clade |1={{clade |label1= Karenitidae |1={{clade |1=NHCC LB44 (Unnamed Zambian karenitid) |2=Karenites ornamentatus}} |label2=Lycideopidae |2={{clade |1=Lycideops longiceps |2={{clade |1=Choerosaurus dejageri |2={{clade |1=Tetracynodon tenuis |2=Tetracynodon darti}} }} }} }} |2={{clade |1=Scaloposaurus constrictus |2={{clade |label1=Ericiolacertidae |1={{clade |1=Ericiolacerta parva |2=Silphedosuchus orenburgensis}} |2={{clade |1=Nothogomphodon danilovi |label2="Ordosiidae" |2={{clade |1=Hazhenia concava |2=Ordosiodon youngi}} |label3=Bauriidae |3={{clade |1=Bauria cynops |2={{clade |1=Antecosuchus ochevi |2=Microgomphodon oligocynus |3=Traversodontoides wangwuensis }} }} }} }} }} }} }} }} }} See also
References1. ^{{cite book|author=C. H. Mendrez|year= 1972|chapter= On the skull of Regisaurus jacobi, a new genus and species of Bauriamorpha Watson and Romer 1956 (=Scaloposauria Boonstra 1953), from the Lystrosaurus-zone of South Africa|title= Studies in Vertebrate Evolution|editors= K.A. Joysey, T.S. Kemp |pages= 191–212|publisher=Oliver & Boyd|location=Edinburgh|isbn= 9780050021316}} {{Therocephalia}}{{Taxonbar|from=Q7309345}}2. ^http://wiredspace.wits.ac.za/bitstream/handle/10539/16101/2007.v.42.Fourie_%26_Rubidge_Postcranial_anatomy_therocephalian.pdf?sequence=1 3. ^http://www.paleofile.com/Theriodontia/Regisaurus.asp 4. ^{{cite journal |last=Kemp |first=T.S. |year=1986 |title=The skeleton of a baurioid therocephalian therapsid from the Lower Triassic (Lystrosaurus Zone) of South Africa |journal=Journal of Vertebrate Paleontology |volume=6 |issue=3 |pages=215–232 | doi = 10.1080/02724634.1986.10011617 | jstor=4523096 |url=http://users.ox.ac.uk/~tskemp/pdfs/BaurioidJVP1986.pdf | format=PDF | accessdate=26 March 2011 }} 5. ^http://www.paleofile.com/Theriodontia/Regisaurussp.asp 6. ^{{cite journal |last=Sidor |first=C.A. |year=2001 |title=[https://www11.cac.washington.edu/burkemuseum/collections/paleontology/sidor/Sidor2001.pdf Simplification as a trend in synapsid cranial evolution] |journal=Evolution |volume=55 |issue=7 |pages=1419–1442 |pmid=11525465 |doi=10.1554/0014-3820(2001)055[1419:saatis]2.0.co;2}} 7. ^{{cite journal |last=Huttenlocker |first=A. |year=2009 |title=An investigation into the cladistic relationships and monophyly of therocephalian therapsids (Amniota: Synapsida) |journal=Zoological Journal of the Linnean Society |volume=157 |issue=4 |pages=865–891 |doi=10.1111/j.1096-3642.2009.00538.x}} 7 : Lopingian synapsids of Africa|Baurioids|Fossil taxa described in 1972|Lopingian genus first appearances|Changhsingian genera|Induan genera|Early Triassic genus extinctions |
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