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Placenta rnye lat Placentalia ot placenta placenta bukvalno pirog naibolee obshirnaya gruppa mlekopitayushih vklyuchaet primerno 94 sovremennyh vidov etogo klassa Po sovremennym predstavleniyam rassmatrivaetsya kak kronovaya gruppa dlya totalnoj gruppy euteriev Eutheria sestrinskoj klade po otnosheniyu k klade metateriev Metatheria dlya poslednej kronovoj gruppoj sluzhat sumchatye Marsupialia V izvestnyh klassifikaciyah mlekopitayushih libo ne pripisyvayut klade Placentalia opredelyonnogo ranga libo traktuyut eyo kak takson rang kotorogo opredelyayut po raznomu kak podklass infraklass kogortu ili nadotryad Placentarnye1 j ryad obyknovennyj vampir chelovek razumnyj severnye morskie slony 2 j ryad lisya belka belobryuhij yasher savannye slony 3 j ryad burchellovy zebry malajskij sherstokryl severnyj olen 4 j ryad gorbatyj kit zvezdonos bolshaya panda 5 j ryad gigantskij bronenosec hobotkovaya sobachka Petersa Nauchnaya klassifikaciyaDomen EukariotyCarstvo ZhivotnyePodcarstvo EumetazoiBez ranga Dvustoronne simmetrichnyeBez ranga VtorichnorotyeTip HordovyePodtip PozvonochnyeInfratip ChelyustnorotyeNadklass ChetveronogieKlada AmniotyKlada SinapsidyKlass MlekopitayushiePodklass ZveriKlada EuteriiInfraklass PlacentarnyeMezhdunarodnoe nauchnoe nazvaniePlacentalia Owen 1837NadotryadyAfroterii Afrotheria Ksenartry Xenarthra Euarchontoglires Lavraziaterii Laurasiatheria Sistematika v VikividahIzobrazheniya na VikiskladeEOL 42399417FW 91965 Otlichitelnym priznakom placentarnyh yavlyaetsya rozhdenie detyonyshej v otnositelno razvitoj stadii Eto vozmozhno blagodarya nalichiyu placenty vremennogo organa cherez kotoryj embrion poluchaet ot materi pitatelnye veshestva i antitela i izbavlyaetsya ot produktov zhiznedeyatelnosti Placenta imeetsya i u sumchatyh no u placentarnyh ona bolee sovershenna blagodarya nalichiyu trofoblasta naruzhnogo sloya embriona obespechivayushego formirovanie ektodermy vorsinok horiona kotorye gluboko prorastayut v epitelij matki Kletki trofoblasta sozdayut pri etom mezhdu materinskoj i embrionalnoj tkanyami aktivnyj barer prepyatstvuyushij ottorzheniyu ploda iz za nesovmestimosti tkanej eto i delaet vozmozhnym sushestvennoe prodlenie perioda vnutriutrobnogo razvitiya v techenie kotorogo plod nadyozhno zashishyon ot neblagopriyatnyh uslovij vneshnej sredy Evolyuciya placentarnyhYuramajya rekonstrukciya Posle mel paleogenovogo vymiraniya v hode kotorogo v chastnosti ischezli neptichi dinozavry po bolshej chasti malenkim i neznachitelnym do togo mlekopitayushim otkrylis novye zhiznennye prostranstva i ekologicheskie nishi Dve iz sushestvovavshih vetvej mlekopitayushih sumchatye v Yuzhnoj Amerike i Avstralii i placentarnye na drugih kontinentah sumeli osobenno shiroko rasprostranitsya i razvit bolshoe kolichestvo vidov Analiz polnyh genomov ehidny i utkonosa pokazyvaet chto predki yajcekladushih mlekopitayushih otdelilis ot predkov placentarnyh i sumchatyh primerno 187 mln let nazad Po nekotorym dannym poslednij obshij predok vseh placentarnyh zhil v konce melovogo perioda okolo 69 mln let nazad nezadolgo do mel paleogenovogo vymiraniya V literature vprochem obsuzhdayutsya i drugie modeli evolyucii placentarnyh kotorye dayut gorazdo bolee rannie datirovki soglasno kotorym odnoprohodnye razoshlis s placentarnymi mlekopitayushimi 217 161 mln let nazad Chto kasaetsya bazalnyh euteriev to ih iskopaemye ostatki izvestny iz sloyov namnogo bolee drevnih chem granica mela i kajnozoya V 2002 godu byla opisana eomajya eyo ostanki ocenivayutsya vozrastom 125 mln let V 2011 godu poluchila opisanie najdennaya v otlozheniyah yurskogo perioda provincii Lyaonin na yugo vostoke Kitaya yuramajya eyo vozrast ocenivaetsya priblizitelno v 160 mln let i pervonachalnyj analiz pozvolili eyo takzhe otnesti k euteriyam V 2010 godu v Kitae byli najdeny ostanki cherepa nebolshogo mlekopitayushego Acristatherium yanensis v otlozheniyah vozrastom 123 mln let ego tozhe rassmatrivali v kachestve euteriya Istoriya izucheniyaPervym kto vydelil v sostave mlekopitayushih gruppu primerno sootvetstvuyushuyu placentarnym v ih sovremennom ponimanii byl francuzskij zoolog A Blenvil kotoryj v rabote Prodrome dʼune nouvelle distribution systematique du regne animale 1816 vvyol delenie nazemnyh mlekopitayushih kitoobraznyh on ne rassmatrival na dva podklassa Monodelphes odnoutrobnye t e placentarnye i Didelphes dvuutrobnye sumchatye i odnoprohodnye Pozdnee v 1834 godu v svoyom kurse lekcij on vydelil odnoprohodnyh v otdelnyj klass Ornithodelphes pticeutrobnye U nemeckogo estestvoispytatelya E Gekkelya 1866 my nahodim te zhe tri podklassa no pod nazvaniyami Placentalia Marsupialia i Monotrema V trude Arrangement of the Families of Mammals 1872 amerikanskij zoolog T Gill podrazdelyaet mlekopitayushih na podklassy Eutheria placentarnye i sumchatye nazvanie obrazovano ot dr grech eὖ polnostyu vpolne i 8hr zver i oznachaet vysshie zveri i Prototheria odnoprohodnye Anglijskij zoolog T Geksli v rabote On the application of the laws of evolution to the arrangement of the Vertebrata and more particularly of the Mammalia 1880 otdelyaet sumchatyh ot placentarnyh vvodya dlya nih takson Metatheria pravda tri osnovnye gruppy mlekopitayushih Geksli traktoval skoree kak stupeni evolyucii V sisteme mlekopitayushih predlozhennoj amerikanskim zoologom U Gregori v rabote The orders of mammals 1910 sovremennye mlekopitayushie podrazdeleny na podklassy Prototheria i Theria prichyom vtoroj v svoyu ochered delitsya na infraklassy Metatheria i Eutheria Takoe delenie sovremennyh mlekopitayushih ispolzuet i amerikanskij paleontolog Dzh G Simpson v svoej sisteme predstavlennoj im v knige The Principles of Classification and a Classification of Mammals 1945 na protyazhenii pochti vsego XX veka ono gospodstvovalo prakticheski bezrazdelno V sisteme Simpsona nazvanie Placentalia Owen 1837 rassmatrivalos kak sinonim dlya Eutheria Gill 1872 Takaya traktovka neredko vstrechaetsya i ponyne no vsyo bolshee rasprostranenie poluchaet inoj podhod kogda nazvanie Placentalia primenyayut dlya kronovoj gruppy a Eutheria dlya sootvetstvuyushej totalnoj gruppy Inache govorya Placentalia opredelyayut kak naimenshuyu kladu soderzhashuyu obshego predka vidov Dasypus novemcinctus devyatipoyasnyj bronenosec Elephas maximus aziatskij slon i Bos taurus dikij byk vmeste so vsemi ego sovremennymi i vymershimi potomkami a v Eutheria vklyuchayut takzhe i vse vymershie bokovye vetvi kotorye v filogeneticheskom plane blizhe placentarnym chem k sumchatym Na privedyonnoj kladogramme pokazany filogeneticheskie svyazi mezhdu gruppoj Placentalia i bazalnymi euteriyami vyyavlennye v hode neskolkih issledovanij Eutheria Eomaia Murtoilestes Montanalestes angl angl i Taeniodonta angl isp Leptictida Purgatorius angl Placentalia Rezultaty ukazannyh issledovanij v osnovnom soglasuyutsya drug s drugom no ne vsegda soglasie okazyvaetsya polnym Tak po dannym issledovaniya 2014 goda rod Purgatorius otnositsya ne k bazalnym euteriyam kak pokazano na kladogramme v sootvetstvii s drugimi issledovaniyami a k primatam i sledovatelno yavlyaetsya placentarnym V to zhe vremya kladisticheskij analiz ne podtverdil pervonachalnye predpolozheniya o prinadlezhnosti k euteriyam rodov Juramaia i Acristatherium otdelenie pervogo iz nih ot evolyucionnoj linii tribosfenidov soglasno etomu analizu predshestvovalo razdeleniyu poslednih na metateriev i euteriev a vtoroj otnositsya k rannim metateriyam KlassifikaciyaV nastoyashee vremya placentarnye yavlyayutsya samoj rasprostranyonnoj i raznoobraznoj kladoj sredi mlekopitayushih Placentarnye delyatsya na chetyre nadotryada opredelyayushihsya geneticheskim rodstvom i obshim istoricheskim proishozhdeniem Tradicionnaya klassifikaciya Magnotryad Ksenartry Otryad Bronenoscy Otryad NepolnozubyeMagnotryad Epitheria Nadotryad Leptiktidy Nadotryad Grandotryad Mirotryad Prygunchiki Mirotryad Otryad Otryad Zajceobraznye Mirotryad Otryad Otryad Gryzuny Grandotryad Ferae Otryad Cimolesty vklyuchaya Pangolinov Otryad Kreodonty Otryad Hishnye Grandotryad Otryad Zlatokrotovye Otryad Ezheobraznye Otryad Zemlerojkovye Grandotryad Archonta Otryad Rukokrylye Otryad Primaty vklyuchaya Sherstokrylov Otryad Tupaji Grandotryad Kopytnye Otryad Trubkozuby Otryad Dinoceraty Mirotryad Otryad Otryad Kondilyartry Otryad Arctostylopida Otryad Kitoobraznye Otryad Parnokopytnye Mirotryad Meridiungulata Otryad Litopterny Otryad Notoungulyaty Otryad Astrapoterii Otryad Ksenungulyaty Otryad Piroterii Mirotryad Altungulata Otryad Neparnokopytnye Otryad ili PolukopytnyeSovremennaya klassifikaciya Afroterii Afrotheria nemnogochislennaya gruppa na pervyj vzglyad krajne raznyh zhivotnyh K nej prinadlezhat trubkozubye Tubulidentata damany Hyracoidea sireny Sirenia hobotnye Proboscidea prygunchikovye Macroscelidea i afrosoricidy Afrosoricida K afroteriyam otnosyatsya i vymershie nyne desmostilii Desmostylia i embritopody Embrithopoda Prarodinoj etogo nadotryada schitaetsya Afrika Ksenartry Xenarthra vklyuchaet otryady nepolnozubyh Pilosa i bronenoscev Cingulata Voznik veroyatno v Yuzhnoj Amerike Boreoeutheria Laurasiatheria eto krupnaya gruppa chastyu kotoroj yavlyayutsya nasekomoyadnye Eulipotyphla rukokrylye Chiroptera pangoliny yashery Pholidota hishnye Carnivora neparnokopytnye Perissodactyla kitoparnokopytnye Cetartiodactyla parnokopytnye Artiodactyla i kitoobraznye Cetacea K lavraziateriyam otnosyatsya i vymershie nyne kreodonty Creodonta mezonihii Mesonychia i cimolesty Cimolesta Voznikli predpolozhitelno na drevnem kontinente Lavrazii Euarchontoglires k gruppe otnosyatsya gryzuny Rodentia zajceobraznye Lagomorpha tupaji Scandentia sherstokryly Dermoptera i primaty Primates Rody ne imeyushie chyotkoj klassifikacii Acristatherium Akristaterii Deccanolestes Eomaia Eomaji Horolodectes Murtoilestes Murtojlesty Plesiorycteropus Tingamarra Zalambdalestes Zalambdalestesy Sleduyushie rody raznye issledovateli otnosyat k stem gruppe libo Euthetia libo Theria do razdeleniya poslednej klady na Euthetia i Metatheria Juramaia Yuramaji Montanalestes Montanalestesy Sm takzhe Dinoceraty Dinocerata Kondilyartry Condylarthra HyaenodontaPrimechaniyaCherepanov G O Ivanov A O Iskopaemye vysshie pozvonochnye 2 e izd SPb Izd vo S Peterburgskogo un ta 2007 202 s ISBN 978 5 288 04308 6 9 aprelya 2022 goda S 128 136 Dvoreckij I H Latinsko russkij slovar 3 e izd M Russkij yazyk 1986 840 s S 590 Raznoobrazie mlekopitayushih O L Rossolimo I Ya Pavlinov S V Kruskop A A Lisovskij N N Spasskaya A V Borisenko A A Panyutina M Izdatelstvo KMK 2004 Ch I S 67 366 s Raznoobrazie zhivotnyh ISBN 5 87317 098 3 Barabash Nikiforov I I Formozov A N Teriologiya M Vysshaya shkola 1963 396 s S 13 Raznoobrazie mlekopitayushih O L Rossolimo I Ya Pavlinov S V Kruskop A A Lisovskij N N Spasskaya A V Borisenko A A Panyutina M Izdatelstvo KMK 2004 Ch I 366 s Raznoobrazie zhivotnyh ISBN 5 87317 098 3 S 178 Konstantinov V M Naumov S P Shatalova S P Zoologiya pozvonochnyh 7 e izd M Izdat centr Akademiya 2012 448 s ISBN 978 5 7695 9293 5 S 350 McKenna Bell 1997 p 80 Dzerzhinskij F Ya Vasilev B D Malahov V V Zoologiya pozvonochnyh 2 e izd M Izdat centr Akademiya 2014 464 s ISBN 978 5 4468 0459 7 S 418 OʼLeary M A Allard M Novacek M J Meng Jin Gatesy J Building the Mammalian Sector of the Tree of Life Combining Different Data and a Discussion of Divergence Times for Placental Mammals Assembling the Tree of Life Ed by J Cracraft and M J Donoghue Oxford Oxford University Press 2004 xiii 576 p ISBN 0 19 517234 5 P 490 516 Averyanov A O Lopatin A V Makrosistematika placentarnyh mlekopitayushih sovremennoe sostoyanie problemy Zoologicheskij zhurnal 2014 T 93 7 S 798 813 doi 10 7868 S0044513414070034 31 avgusta 2021 goda Beck R M D Lee M S Y Ancient dates or accelerated rates Morphological clocks and the antiquity of placental mammals Proceedings of the Royal Society B Biological Sciences 2014 Vol 281 no 1793 P 20141278 doi 10 1098 rspb 2014 1278 PMID 25165770 Kerroll R Paleontologiya i evolyuciya pozvonochnyh V 3 h tt T 3 M Mir 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Czelusniak J Page S amp Meireles Where DNA Sequences Place Homo sapiens in a Phylogenetic Classification of Primates McKenna M C Bell S K Classification of Mammals Above the Species Level New York Columbia University Press 1997 631 p ISBN 0 231 11013 8 Simpson G G The Principles of Classification and a Classification of Mammals Bull of the American Museum of Natural History 1945 Vol 85 P 1 350 SsylkiEvolution of the mammalian placenta revealed by phylogenetic analysis angl A S Rautian G S Rautian S I Nikolaev S E Antonarakis 2007 Istoricheskaya zoogeografiya tetrapod i molekulyarnoe datirovanie podtverzhdayut neozhidanno rannee rashozhdenie osnovnyh stvolov mlekopitayushih Sravnenie genomov 29 mlekopitayushih prolivaet svet na evolyuciyu cheloveka Novoe filogeneticheskoe drevo mlekopitayushih primirilo paleontologicheskie i molekulyarnye dannye
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