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Steropodon rid doistorichnih odnoprohidnih abo ssavciv sho vidkladayut yajcya Vin mistit odin vid Steropodon galmani yakij zhiv priblizno vid 105 do 93 3 miljoniv rokiv tomu u rannomu ta piznomu krejdyanomu periodi Ce odne z najdavnishih viyavlenih odnoprohidnih tvarin i odne z najdavnishih vidkrittiv avstralijskih ssavciv Steropodon Period isnuvannya albskij yarus senomanskij yarus 105 93 3 mln r t PreꞒ Ꞓ O S D C P T J K Ꝑ N Biologichna klasifikaciya Carstvo Tvarini Animalia Tip Hordovi Chordata Klada Sinapsidi Synapsida Klas Ssavci Mammalia Ryad Odnoprohidni Monotremata Rodina Steropodontidae Rid Steropodon Archer Ritchie amp 1985 Vid S galmani Binomialna nazva Steropodon galmani Archer Ritchie amp 1985TaksonomiyaZubna sistema Steropodon desho shozha na taku u terian placentarnih i sumchastih zokrema nayavnist tribosfenichnogo korinnogo zuba yakij yak vvazhalosya buv pritamannij lishe teriyam she z krejdyanogo periodu Ce razom iz vidkrittyam tribosfenovih molyariv odnoprohidnih rodichiv Ausktribosphenos i Ambondro mahabo z yakih ostannij rozvinuvsya v yurskomu periodi prizvelo do visnovku sho molyar evolyucionuvav nezalezhno v dvoh liniyah Ce sponukalo do stvorennya pidklasiv Australosphenida odnoprohidni ta vimerli rodichi i Tribosphenida placentarni ta sumchasti Odnak vrahovuyuchi sho cya klasifikaciya bazuyetsya lishe na zalishkah shelepi ta nizhnih zubiv mozhe buti nedostatno dokaziv shob zrobiti ostatochnij visnovok Ce mozhe buti yedinij opisanij predstavnik rodini Steropodontidae Inshim zaproponovanim chlenom ye Teinolophos yakij buv peremishenij u svoyu vlasnu rodinu Teinolophidae Flanneri ta in 2022 Takozh bezzuba chastkova nizhnya shelepa z faciyi Finch Clay formaciyi Griman Creek bula pripisana Musseru 2013 neopisanomu steropodontidu Z inshogo boku Flannery et al pripustiv sho cya nizhnya shelepa mozhe nalezhati do novogo rodu ta vidu steblovih ornitorinhid PrimitkiBell Phil R Fanti Federico Hart Lachlan J Milan Luke A Craven Stephen J Brougham Thomas Smith Elizabeth 2019 Revised geology age and vertebrate diversity of the dinosaur bearing Griman Creek Formation Cenomanian Lightning Ridge New South Wales Australia Palaeogeography Palaeoclimatology Palaeoecology 514 655 671 doi 10 1016 j palaeo 2018 11 020 Stokstad E 2001 Tooth theory revises history of mammals Science 291 5501 26 doi 10 1126 science 10 1126 SCIENCE 291 5501 26 PMID 11191993 Flannery T F Rich T H Vickers Rich P Ziegler T Veatch E G Helgen K M 2022 A review of monotreme Monotremata evolution Alcheringa An Australasian Journal of Palaeontology 46 3 20 doi 10 1080 03115518 2022 2025900 S2CID 247542433 Musser A M 2013 Classification and evolution of the monotremes U Ashwell K red Neurobiology of Monotremes Brain Evolution in Our Distant Mammalian Cousins Melbourne CSIRO Publishing s 1 17 ISBN 9780643103153
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