| THE DISCOVERY OF THE CRIBRIFORM PLATE IN SINOCONODON YOUNCI (TRICONODONTA,MAMMALIA) |
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| 作者姓名： | Zhang Fakui |
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| 作者单位： | Zhang Fakui (Institute of Vertebrate Paleontology and Paleoanthropology，Acadcmia Sinica Beijing 100044)Du Xiangke;Luo Dexin;Jing Jinping;Dai Liping (Department of Radiological Treatment，Renmin Hospital，Medical University of Beijing Beijing 100044) |
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| 摘 要： | ThepresenceofacribriformplateinlivingplacentalsandthemarsupialsandabsenceinmonotremesmayimplythatmammalsarediphyleticandtheoriginofcribriformplatetookplacewithinthcMammalia.Buttheconc1usioncamefromthe1ivingmammalsonly,andhasnotbeensupportedbypalaeontologicalevidence.Itsappearanceinoneoftheoldestandthemostprimitivemammals,Sinoconodon,possiblysuggeststhatthecribriformplatemayoccurearlier,i.e.inthetimeofthetransitionfromtheadvancedmammal-likereptiles,Cynodontia,tothetruemammals,andthatthedistrib…
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THE DISCOVERY OF THE CRIBRIFORM PLATE IN SINOCONODON YOUNCI (TRICONODONTA,MAMMALIA) |
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| Zhang Fakui.THE DISCOVERY OF THE CRIBRIFORM PLATE IN SINOCONODON YOUNCI (TRICONODONTA,MAMMALIA)[J].Vertebrata Palasiatica,1994(3). |
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| Authors: | Zhang Fakui |
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| Abstract: | A skull of Sinoconodon youngi (Triconodonta, Mammalia) is scanned with a Toshiba TCT 80A CT scanner . On the cornputed tomography of the mesosagittal plane of the skull, an image between the braincase cavity and the nasal cavity indicates the existence of a cribri form place in the earliest mammals. |
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| Keywords: | Cribriform plate Phylogeny Mammalia |
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