Vertebrata Palasiatica ›› 1994, Vol. 32 ›› Issue (03): 195-199.
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Zhang Fakui, Du Xiangke Luo Dexin Jing Jinping Dai Liping
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张法奎, 杜湘,珂, 罗德馨 井金萍, 戴丽萍
Abstract: A skull of Sinoconodon youngi (Triconodonta, Mammalia) is scanned with a Toshiba TCT 80A CT scanner. On the computed tomography of the mesosagittal plane of the skull, an image between the braincase cavity and the nasal cavity indicates the existence of a cribriform place in the earliest mammals. The presence of a cribriform plate in living placenta Is and the marsupials and absence in monotremes may imply that mammals are diphyletic and the origin of cribriform plate took place within the Mammalia. But the conclusion came from the living mammals only, and has not been supported by palaeontological evidence. Its appearance in one of the oldest and the most primitive mammals, Sinoconodon, possibly suggests that the cribriform plate may occur earlier, i.e. in the time of the transition from the advanced mammal-like reptiles, Cynodontia, to the true mammals, and that the distribution of the cribriform plate in the Theria and the Atheria contradicts with the diphyletic of mammals.
摘要: 中国尖齿兽头骨化石经CT检查,证实在脑腔和鼻腔之间有筛板骨存在。
Zhang Fakui, Du Xiangke Luo Dexin Jing Jinping Dai Liping. THE DISCOVERY OF THE CRIBRIFORM PLATE IN SINOCONODON YOUNGI (TRICONODONTA, MAMMALIA). Vertebrata Palasiatica, 1994, 32(03): 195-199.
张法奎, 杜湘,珂, 罗德馨 井金萍, 戴丽萍. 1994, 32(03): 195-199, CT观察杨氏中国尖齿兽(Sinoconodon youngi)头骨化石标本的鼻部. 古脊椎动物学报.
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https://www.vertpala.ac.cn/EN/Y1994/V32/I03/195