see Evolution of mammals Taxobox name Eutheria fossil range Fossil range 160 0 Jurassic Recent image ... ia phylum Chordate Chordata classis Mammal ia subclassis Theria infraclassis Eutheria infraclassis ... Eutheria phylogeny work Mikko s Phylogeny Archive accessdate 2008 07 24 url http www.helsinki.fi mhaaramo metazoa deuterostoma chordata synapsida eutheriaeutheria index.html ref subdivision Placentalia ... Bobolestes Eomaia Montanalestes Murtoilestes Prokennalestes and others Eutheria IPA en ju ri pron ... , was also from China and is dated to the Early Cretaceous period, about ma 125 . Eutheria was introduced ... placentals from other mammals cannot be used in defining Eutheria. The features of Eutheria that distinguish ... 2 cellspacing 0 clade style font size 90 line height 75 label1 Eutheria 1 clade 1 clade 1 ... members of Eutheria Boreoeutheria , e.g. badger s, rabbits, guinea pig s, dog s, dolphin s Euarchontoglires ... make up the crown group Placentalia placental mammals . Eutheria also includes now extinct lineages ... image caption Fossil record of Cretaceous eutheria ref name JiLuoYuan2002EarliestEutherian image ... eutheria Annotation 15 135 Origin br of br eutheria Annotation 5 455 span style background color black ... Theria Metatheria Other Metatheria Marsupial s Eutheria Other Eutheria Placental s clade label1 ... 2 Monotreme s 2 clade 1 Metatheria 2 Eutheria div Simplified, non systematic, outline of evolution of eutheria from cynodont therapsid s. ref name JiLuoYuan2002EarliestEutherian br extinct div References wikispecies Eutheria Wikisource1911Enc Monodelphia reflist Further reading Goloboff ... br Eutheria bg ca Euteri cs Placent lov de H here S ugetiere nv Biishch id Dah l n g ... ko hr Vi i sisavci id Eutheria it Eutheria jv Eutheria kk ht Mamif plasent ... ja frr Huuger tetjdiarten no Placentale pattedyr nn Placentale pattedyr oc Eutheria pl o yskowce pt Placent rios ro Eutheria rm Placentalia ru simple Eutheria sl Vi ji sesalci fi Istukkanis kk t ... more details
orphan date December 2007 Mesaxonians are a group of mammal s that are form the, not widely accepted, Order biology superorder Mesaxonia . The superorder includes the Perissodactyla perissodactylids , Hyracoidea hyracoids , Proboscidea proboscidians , and sirenia ns, all part of the Class biology infraclass Eutheria . However, this group is not yet published, it s a theory based on the number of digits, teeth, and skull characteristics. External links http www.ucmp.berkeley.edu mammal mesaxonia mesaxonia.html Mesaxonia Category Mammals Category Controversial taxa ... more details
Taxobox name Pyrotheriidae image Pyrotherium romeroi e.jpg image caption The Pyrotheriidae Pyrotherium romeroi with Rhynchippus equinus regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Theria infraclassis Eutheria ordo Pyrotheria familia Pyrotheriidae familia authority Florentino Ameghino Ameghino , 1889 subdivision ranks Genus Genera subdivision Pyrotherium Propyrotherium Carlozittelia Gryphodon Proticia Baguatherium Colombitherium Pyrotheriidae is the only family in the order biology order Pyrotheria , provided one does not include the Paleocene genus, Carodnia . These extinct , mastodon like ungulates include the genus genera Baguatherium , Carolozittelia , Colombitherium , Gryphodon , Propyrotherium , Proticia , and Pyrotherium . ref name Salas cite journal author Salas, R., S nchez, J., and Chacaltana, C. year 2006 title A new pre Deseadan pyrothere Mammalia from northern Peru and the wear facets of molariform teeth of Pyrotheria journal Journal of Vertebrate Paleontology volume 26 issue 3 pages 760 769 doi 10.1671 0272 4634 2006 26 760 ANPPMF 2.0.CO 2 ref References reflist refbegin http www.accessscience.com Encyclopedia 5 56 Est 560300 frameset.html?doi Access Science http www.fmnh.helsinki.fi users haaramo Metazoa Deuterostoma Chordata Synapsida Eutheria Meridiungulata Xenungulata.htm Mikko s Phylogeny Archive refend Category South American ungulates paleo mammal stub it Pyrotheriidae ... more details
Taxobox name Montanalestes fossil range Early Cretaceous image image width image caption regnum Animal ia phylum Chordata classis Mammal ia subclassis Theria infraclassis Eutheria unranked familia Tribosphenida genus Montanalestes genus authority Richard L. Cifelli Cifelli , 1999 subdivision ranks Species subdivision M. keeblerorum small Cifelli, 1999 Type species type small Montanalestes is an extinct mammal known from the Cretaceous in North America . Clade 1 Clade style white space nowrap label1 Metatheria 1 Clade 1 Sinodelphys szalayi 2 Cainozoic metatherian label2 Eutheria 2 Clade 1 Juramaia sinensis 2 Montanalestes keeblerorum 3 Clade 1 Murtoilestes abramovi 2 Eomaia scansoria 3 Prokennalestes trofimovi 4 Cainozoic placentalia Category Cretaceous mammals ca Montanalestes es Montanalestes it Montanalestes pl Montanalestes ru ... more details
Unreferenced stub type animal auto yes date December 2009 Taxobox name Dipodoidea fossil range Early Eocene Recent image Wuestenspringmaus painting.jpg image width 200px image caption Jaculus jaculus regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Eutheria ordo Rodent ia subordo Myomorpha superfamilia Dipodoidea superfamilia authority Johann Fischer von Waldheim Fischer de Waldheim , 1817 Dipodoidea is a Taxonomic rank superfamily of rodent s that includes Jumping mice and Jerboa s. Rodents Category Rodents Rodent stub uk ... more details
Taxobox name Alopecocyon status fossil fossil range mid Miocene regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Eutheria superordo Laurasiatheria ordo Carnivora subordo Caniformia superfamilia Musteloidea familia Ailuridae subfamilia Simocyoninae genus Alopecocyon species A. leardi binomial Alopecocyon leardi binomial authority Camp, 1940 Alopecocyon was a small relative of the modern Red Panda . It weighed only about 11 lbs 5 kg . It was closely related to Simocyon , a larger member of its group. Its fossils have been found in France , Poland , and Slovakia . paleo carnivora stub Category Prehistoric carnivorans Category Miocene mammals ... more details
Unreferenced date February 2009 Taxobox name Ashoroa fossil range image image width image caption regnum Animal ia phylum Chordate Chordata classis Mammal ia infraclassis Eutheria superordo Afrotheria ordo Desmostylia familia Palaeoparadoxiidae genus Ashoroa genus authority Inuzuka, 2000 species A. laticosta binomial Ashoroa laticosta binomial authority Inuzuka, 2000 Ashoroa is an extinct genus of Desmostylia . Fossils for Ashoroa came from Japan and were dated from the late Oligocene. Category Desmostylians Paleo mammal stub portal Paleontology ... more details
Taxobox name Asioryctitheria fossil range Early Cretaceous Early Late Cretaceous image Asioryctes nemegtensis.jpg image width 250px image caption Asioryctes nemegtensis skull regnum Animal ia phylum Chordata classis Mammalia subclassis Theria infraclassis Eutheria ordo Asioryctitheria ordo authority Novacek et al., 1997 subdivision ranks Families & Genera subdivision Murtoilestes Prokennalestes Daulestes Asioryctidae Asioryctes Ukhaatherium ? Bulaklestes Kennalestidae Asioryctitheria asian digging beasts is an extinct order of early eutheria ns. Skull structure With the exception of Prokennalestes , these advanced forms lacked a Meckelian groove . Furthermore they were equipped with double rooted Canine tooth canine s, a lower premolar with a reduced or absent metaconid and a more elongated lower premolar than their predecessors. In addition, the entoconid and hypoconulid on the lower molars are untwinned, the entotympanic is non existent, the alisphenoid is enlarged, a Vidian foramen is present as well as a promontorium linked to the paroccipital process via the crista interfenestralis . Further reading Zofia Kielan Jaworowska, Richard L. Cifelli, and Zhe Xi Luo, Mammals from the Age of Dinosaurs Origins, Evolution, and Structure New York Columbia University Press, 2004 , 499 501. External links http home.arcor.de ktdykes basepi.htm MESOZOIC MAMMALS Basal Eutheria Two, an internet directory http www.ingentaconnect.com content tandf slet 2000 00000033 00000004 art00008 A eutherian mammal from the Early Cretaceous of Russia at Ingenta Category Prehistoric mammals of Asia paleo mammal stub ca Asiorictiteri es Asioryctitheria it Asioryctitheria pt Asioryctitheria ... more details
Taxobox name Afrosoricida ref name msw3 fossil range Fossil range Early Miocene Recent image Tanrek.jpg image width 240px image caption Tenrec ecaudatus regnum Animal ia phylum Chordate Chordata classis Mammal ia infraclassis Eutheria superordo Afrotheria ordo Afrosoricida ordo authority Stanhope biologist Stanhope , 1998 subdivision ranks Families subdivision Chrysochloridae br Tenrecidae The order biology order Afrosoricida a Latin Greek compound name which means looking like African shrews contains the golden mole s of southern Africa and the tenrec s of Madagascar and Africa, two families of small mammal s that have traditionally been considered to be a part of the order Insectivora . Some biologists use Tenrecomorpha as the name for the tenrec golden mole clade , but prevailing evidence suggests Afrosoricida is more appropriate and Tenrecomorpha is used here as the name of the tenrec suborder. ref name msw3 MSW3 Bronner pages 71 81 ref Traditionally, these two families were grouped with the hedgehog s, shrew s and Mole animal mole s in the Lipotyphla . However, there have always been minority opinions suggesting that Tenrecomorpha, or at least the golden moles, are not true lipotyphlans. These opinions are now supported by many genetic studies suggesting an association between Tenrecomorpha and various other African mammals in a proposed superorder known as Afrotheria however there is no strong morphological evidence to link the Afrosoricida together with other Afrotherians. The Afrosoricida are sometimes considered part of the Afroinsectiphilia , a clade within the Afrotheria. INFRACLASS Eutheria EUTHERIA placental mammals Superorder Afrotheria Clade Afroinsectiphilia Order Afrosoricida Suborder Tenrecomorpha Family Tenrecidae tenrecs and otter shrews 30 species in 10 genera Suborder Chrysochloridea Family Chrysochloridae golden moles about 21 species in 9 genera Order Macroscelidea elephant shrews Order Tubulidentata Aardvark Clade Paenungulata Or ... more details
Refimprove date November 2008 Taxobox name Afroinsectiphilia fossil range fossil range 55 0 Early Eocene ? Recent image Tanrek.jpg image width 250px image caption Tail less Tenrec regnum Animal ia classis Mammal ia subclassis Eutheria superordo Afrotheria unranked familia Afroinsectiphilia subdivision ranks Order biology Order s subdivision Afrosoricida Macroscelidea Tubulidentata The Afroinsectiphilia African insectivore s is a clade that has been proposed based on the results of recent molecular studies ref Asher, Robert J. Bennet, Nigel and Lehmann, Thomas. The new framework for understanding placental mammal evolution, BioEssays 31 8 853 ref . Many of its orders were once regarded as part of the order Insectivora , but Insectivora is now considered to be polyphyletic and is, as a result, possibly obsolete. This proposed classification is based on molecular studies only, and there is no morphology linguistics morphological evidence for it. ref citebook title The Rise of Placental Mammals Origins and Relationships of the Major Extant Clades first1 Kenneth David last1 Rose first2 J. David last2 Archibald publisher JHU Press year 2005 id ISBN 0 8018 8022 X page 65 ref The golden mole s and tenrec s are part of this clade. Some also regard the elephant shrew s and aardvark s as part of it, although these two order are traditionally seen as primitive ungulate s. The sister group of the Afroinsectiphilia are the Paenungulata , which are also traditionally regarded as ungulates. If the clade of Afrotheria is genuine, then the Afroinsectiphilia are the closest relatives of the Pseudungulata here regarded as part of Afroinsectiphilia and the Paenungulata. In a classification governed by morphological data, both the Pseudungulata and Paenungulata are seen as true ungulates , thus not related to Afroinsectiphilia. However, DNA research is thought to provide a more fundamental classification. Taxonomic tree INFRACLASS Eutheria EUTHERIA placental mammals Superorder Afrotheria ... more details
Unreferenced date February 2008 The class Mammalia mammal s is divided into two subclasses based on reproductive techniques egg laying mammals monotreme s and mammals which give live birth theria ns . The latter subclass is divided into two infraclasses pouched mammals marsupial s and placental mammals eutheria ns . This list is, as yet, incomplete. However for reasons of space, it has been broken into two sections List of placental mammals List of monotremes and marsupials non placental mammals Expand list date August 2008 See also List of mammal genera Lists of animals List of mammalogists List of regional mammals lists Category Mammals Category Lists of mammals nv Bidi Daazdo g d Da a t o g et Imetajate loend fa ko nl Lijst van zoogdieren fi Luettelo nis kk ist yi zh ... more details
italictitle Unreferenced date August 2008 Taxobox fossil range Early to Middle Eocene image Ailuravus macrurus.JPG image caption Ailuravus macrurus and Strigogyps sapea regnum Animalia phylum Chordata classis Mammal ia subclassis Eutheria unranked superordo Euarchontoglires superordo Glires ordo Rodent ia familia Ischyromyidae subfamilia Ailuravinae genus Ailuravus genus authority R timeyer, 1891 species A. macrurus binomial Ailuravus macrurus File Ailuravus.jpg thumb left Ailuravus macrurus skeleton Ailuravus macrurus Big tailed Cat ancestor was a primitive, squirrel like rodent, one of the earliest known rodents, from the Messel pit Lagerst tte , in Germany . It lived during the Eocene period of Europe, in forests, and may have been arboreal. Category Eocene mammals Category Prehistoric rodents Category Rodents paleo rodent stub ... more details
unreferenced date February 2009 Taxobox name Carodnia fossil range Paleocene image Carodnia vieirai.JPG image caption Carodnia vieirai regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Theria infraclassis Eutheria superordo Meridiungulata ordo Xenungulata familia Carodniidae genus Carodnia species C. vieirai binomial Carodnia vieirai Carodnia vieirai is an extinct Meridiungulata meridiungulate mammal from the Paleocene of South America . It is related to, and possibly gave rise to the order biology order Pyrotheria , into which some experts also place Carodnia . In life, it would have been a tapir sized animal. It bore strong resemblances to both some condylarth s and to dinocerata ns, although without tusks or ossicone s. Category Paleocene mammals Category South American ungulates ca Carodnia es Carodnia pl Carodnia pt Carodnia vieirai ... more details
Orphan date October 2008 Taxobox name Leptobos fossil range Pleistocene image Leptobos.jpg image width 250px image caption Leptobos etruscus lower jaw and silhouette regnum Animal ia phylum Chordata classis Mammal ia ordo Artiodactyla familia Bovidae subfamilia Bovinae genus Leptobos genus authority R timeyer , 1878 species L. falconeri L. stenometopon L. syrticus Leptobos is a genus of large Pleistocene bovid found in Europe and Asia . External links http www.helsinki.fi mhaaramo metazoa deuterostoma chordata synapsida eutheria artiodactyla bovioidea boselaphini.html http paleodb.org cgi bin bridge.pl Category Prehistoric bovids Category Pleistocene mammals paleo eventoedungulate stub fr Leptobos ... more details
Orphan date May 2010 Taxobox fossil range regnum Animalia phylum Chordate Chordata classis Mammal ia subclassis Eutheria ordo Cetacea subordo Odontoceti superfamilia Platanistoidea familia Lipotidae genus Parapontoporia binomial authority Barnes 1984 subdivision ranks species subdivision P. pacifica P. sternbergi P. wilsoni Parapontoporia is an extinct genus of dolphin from the Pliocene epoch which contains three species. ref TPBDB http paleodb.org cgi bin bridge.pl?action checkTaxonInfo&taxon no 36795&is real user 1 The Paleobiology Database ref References Reflist http www.sdnhm.org exhibits mystery fg dolphin.html SDNHM Fossil Mysteries Field Guide Long snouted Dolphin Portal Palaeontology Category Dolphins paleo whale stub ... more details
Automatic taxobox fossil range Eocene image Darwinius masillae PMO 214.214.jpg image caption Darwinius Darwinius masillae regnum Animal ia taxon Cercamoniinae subdivision ranks Genus Genera subdivision See text Cercamoniinae is a family biology subfamily within the extinct primate family Notharctidae . Classification Family Notharctidae Subfamily Cercamoniinae Genus Anchomomys Genus Buxella Genus Darwinius Genus Donrussellia Genus Europolemur Genus Mahgarita Genus Panobius Genus Periconodon Genus Pronycticebus No refs cited as yet References reflist External links http www.fmnh.helsinki.fi users haaramo Metazoa Deuterostoma Chordata Synapsida Eutheria Primates Strepsirrhini.htm Mikko s Phylogeny Archive Category Prehistoric prosimians es Cercamoniinae hu Cercamoniinae pt Cercamoniinae ... more details
Taxobox name Guilestes fossil range Fossil range Late Eocene Oligocene regnum Animal ia phylum Chordate Chordata classis Mammalia infraclassis Eutheria superordo Laurasiatheria ordo Mesonychia familia Mesonychidae genus Guilestes subdivision ranks Species subdivision G. acares Guilestes is a mesonychidae mesonychid that lived during the Eocene in south China . Species Genus Guilestes Guilestes acares External links http organismnames.com details.htm?lsid 72500 Orginism Origins http www.npl.utexas.edu vpl databases index.php?mode search&action search&searchtype &locality Yongle Basin Fossil Finder Category Mesonychids Category Paleocene mammals Category Eocene mammals Category Eocene extinctions paleo mammal stub ca Guilestes es Guilestes ... more details
Taxobox name Mongolestes fossil range Fossil range Eocene Oligocene regnum Animal ia phylum Chordate Chordata classis Mammalia infraclassis Eutheria superordo Laurasiatheria ordo Mesonychia familia Mesonychidae genus Mongolestes subdivision ranks Species subdivision M. dolichognathus M. robustus Mongolestes is an extinct mammal genus. Fossils have been found in the Ulan Gochu formation of inner Mongolia and likely originated in Asia . Mongolestes died out completely in the early Oligocene but outlasted all other Mesonychidae , being the last representative genus. Species Genus Mongolestes Mongolestes hadrodens Mongolestes huangheensis External links http eurekamag.com research v 005 valen.php Ancient Research http www.encyclo.co.uk define Mesonychidae History of Mesonychidae http www.babylon.com definition Mesonychidae Origins of Mesonychidae Category Mesonychids Category Paleocene mammals Category Eocene mammals Category Eocene extinctions paleo mammal stub ca Mongolestes es Mongolestes ... more details
Italic title Taxobox name Sahnitherium fossil range Late Cretaceous , fossilrange Maastrichtian regnum Animal ia phylum Chordate Chordata classis Mammal ia infraclassis Eutheria superordo ? Euarchontoglires unranked familia ? Euarchonta genus Sahnitherium genus authority Rana & Wilson, 2003 in paleontology 2003 subdivision ranks Species subdivision S. rangapurensis small Rana & Wilson, 2003 type species type small Sahnitherium is a possible basal phylogenetics basal Euarchontan from the Maastrichtian of the Intertrappean Beds of Andhra Pradesh , India . It may be closely related to Deccanolestes . The holotype is an upper molar, and it is the only specimen of Sahnitherium . ref http home.arcor.de ktdykes basepi.htm ref References Reflist Categories Category Extinct mammals Category Prehistoric mammals Category Cretaceous mammals paleo mammal stub portal Paleontology ... more details
Italic title Taxobox name Hyotheridium fossil range fossilrange Santonian Campanian regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Theria infraclassis ? Eutheria genus Hyotheridium genus authority Gregory & George Gaylord Simpson Simpson , 1926 in paleontology 1926 subdivision ranks Species subdivision H. dobsoni small Gregory & Simpson, 1926 small Hyotheridium is a possible Eutherian from the Late Cretaceous ?late Santonian early Campanian Djadochta Formation of Mongolia . It could be also be a Deltatheriidae Deltatheriid , although the fossil, a poorly preserved skull with the upper and lower jaws connected in a way that makes them hard to separate and to examine, makes it difficult to determine what it is. ref http home.arcor.de ktdykes basepi.htm ref References Reflist Category Cretaceous mammals Category Prehistoric placental mammals paleo mammal stub portal Paleontology ... more details
Taxobox name Carpolestids fossil range Middle Paleocene Early Eocene image CarpolestesCL.png image caption Carpolestes simpsoni regnum Animal ia phylum Chordate Chordata classis Mammal ia infraclassis Eutheria superordo Euarchontoglires ordo Plesiadapiformes familia Carpolestidae familia authority Simpson name Simpson , 1935 subdivision ranks Genus Genera subdivision Parvocristes br Elphidotarsius br Carpodaptes br Carpolestes br Carpomegodon Carpolestidae is a family of primate like Plesiadapiformes that were prevalent in North America and Asia from the mid Paleocene through the early Eocene . Typically, they are characterized by two large upper posterior premolar s and one large lower posterior premolar. They weighed about 20 150g, and were about the size of a mouse . Though they come from the order, Plesiadapiformes, that may have given rise to the primate order, carpolestids are too specialized and derived to be ancestors of primates. Historically, the almost twenty species included within the family were thought to have given rise to each other over time in a linear and straightforward manner. Still today it is widely assumed that Elphidotarsius from the mid to late Paleocene gave rise to Carpodaptes which lived in the late Paleocene and subsequently gave rise to Carpolestes from the early Eocene. As a result, they have been used as biostratigraphic indicators in a variety of paleontological digs. However, the phylogenetic picture has been complicated by the discovery in Asia of both ancestral and derived carpolestids in the same stratigraphic layer. References Fleagle, J. G. 1999. Primate Adaptation and Evolution. San Diego, Academic Press. http www.fmnh.helsinki.fi users haaramo Metazoa Deuterostoma Chordata Synapsida Eutheria Plesiadapiformes Carpolestidae.htm Mikko s Phylogeny Archive Category Plesiadapiformes ca Carpol stid es Carpolestidae pt Carpolestidae ... more details
Taxobox name Oligopithecidae fossil range Late Eocene Early Oligocene regnum Animal ia phylum Chordate Chordata classis Mammal ia ordo Primates subordo Haplorrhini parvordo Catarrhini superfamilia Propliopithecoidea familia Oligopithecidae familia authority Kay & Williams, 1994 subdivision ranks Genus Genera subdivision Proteopithecus Catopithecus Oligopithecus Oligopithecidae is an extinct primate family biology family from the late Eocene of Egypt about 37 million years ago . Its members were probably insectivorous due to their simple molars and cusp arrangement. ref cite journal author Kay, R. F. Ross, C. Williams, B. title Anthropoid Origins journal Science date 1997 02 07 volume 275 issue 5301 pages 797 804 doi 10.1126 science.275.5301.797 pmid 9012340 ref This family split off the lineage of Old World monkey s and ape s sometime after the New World monkey s also split off. ref cite web author Haaramo, M title Mikko s Phylogeny Archive Anthropoidea monkeys and apes url http www.fmnh.helsinki.fi users haaramo metazoa Deuterostoma Chordata Synapsida Eutheria Primates anthropoidea.htm Oligopithecidae accessdate 2007 11 12 ref References reflist External links http www.fmnh.helsinki.fi users haaramo metazoa Deuterostoma Chordata Synapsida Eutheria Primates Propliopithecoidea Oligopithecidae.htm Mikko s Phylogeny Archive Oligopithecidae Category Prehistoric primates Category Eocene mammals zh ... more details
Italic title Taxobox name Acristatherium fossil range fossil range Aptian regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Eutheria genus Acristatherium genus authority Hu et al. , 2010 in paleontology 2010 species A. yanensis binomial Acristatherium yanensis binomial authority Hu et al. , 2010 Acristatherium yanensis is an extinct basal eutheria n from the Early Cretaceous early Aptian , approximately Ma 123 Lujiatun Bed of the Yixian Formation . ref name acristatherium cite journal author Yaoming Hu, Jin Meng, Chuankui Li & Yuanqing Wang year 2010 chapter New basal eutherian mammal from the Early Cretaceous Jehol biota, Liaoning, China journal Proceedings of the Royal Society B volume 277 issue 1679 pages 229 236 title Recent advances in Chinese palaeontology editor Xing Xu, Zhe Xi Luo & Jia Yu Rong doi 10.1098 rspb.2009.0203 pmid 19419990 pmc 2842663 url http rspb.royalsocietypublishing.org content early 2009 05 01 rspb.2009.0203.full.pdf format Portable Document Format PDF ref It was described on the basis of a single specimen holotype from Beipiao , Liaoning , China by Yaoming Hu, Jin Meng, Chuankui Li and Yuanqing Wang in 2010. ref name acristatherium The specimen comprises a partial skull , convert 25 mm long. It appears to possess a vestigiality vestige of a septomaxilla , a feature only otherwise seen in non mammalian therapsid s. ref name acristatherium References reflist Category Cretaceous mammals Category Prehistoric mammals of Asia Category Fossil taxa described in 2010 paleo mammal stub cretaceous stub pl Acristatherium ru ... more details
Taxobox name Therians fossil range Mid Jurassic Recent, fossilrange 165 0 image Laitche P013.jpg image caption A cat Felis catus with her kitten s regnum Animal ia phylum Chordate Chordata classis Mammal ia subclassis Theria subclassis authority Thomas Jeffery Parker Parker & William A. Haswell Haswell , 1897 ref http www.itis.gov servlet SingleRpt SingleRpt?search topic TSN&search value 179916 ITIS Standard Report Page Theria ref subdivision ranks Class biology Infraclasses subdivision Eutheria Metatheria Theria IPAc en icon r i Greek language Greek , wild beast is a Scientific classification subclass of mammal s ref cite web url http animaldiversity.ummz.umich.edu site accounts classification Theria.html title Subclass Theria work Animal Diversity Web author Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey ref that give birth to live young without using a shelled egg biology egg , including both eutheria ns placental mammals and metatheria ns marsupial s and their ancestors . The only omitted extant mammal group is the egg laying monotremes . File Kangaroo and joey03.jpg thumb left Kangaroo , a marsupial , with her Joey marsupial joey Taxonomy Main Mammal classification The rank of Theria may vary depending on the classification system used. The textbook classification system by Vaughan et al. 2000 ref Vaughan, Terry A., James M. Ryan, and Nicholas J. Czaplewski. 2000. Mammalogy Fourth Edition . Saunders College Publishing, 565 pp. ISBN 0 03 025034 X ref gives the following Class Mammal ia Subclass Theria live bearing mammals Infraclass Metatheria marsupials Infraclass Eutheria placentals In the above system Theria is a subclass. Alternatively, in the system proposed by McKenna and Bell 1997 ref McKenna, Malcolm C., and Bell, Susan K. 1997. Classification of Mammals Above the Species Level. Columbia University Press, New York, 631 pp. ISBN 0 231 11013 8 ref it is ranked as a supercohort under the subclass Theriiforme ... more details
Encyclopedia
top
