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选取了亚洲常见的三种冠齿兽类Asiocoryphodon conicus Xu,1976,Heterocoryphodon fl erowi(Chow,1957)和Eudinoceras mongoliensis Osborn,1924,对其臼齿材料进行组织学切片研究,以讨论多尖牙齿齿冠形成模式和估算它们的齿冠形成时间。结果显示,A.conicus,H.fl erowi和E.mongoliensis上第三臼齿齿冠的形成时间分别为2.99±0.1,3.63±0.11和3.68±0.22 yr,三种冠齿兽类的生活史均符合慢生长、长生命型模式。综合考虑体型的影响,相较其他大型植食性动物,H.fl erowi的生活史更适合与现生河马(Hippopotamus amphibius)进行类比,E.mongoliensis的生活史更适合与白犀(Ceratotherium simum)进行类比,而A.conicus的生活史则稍快稍短于现生河马。这些现生类似种的种内变化数据可为冠齿兽类的部分分类学问题提供参考。
Asiocoryphodon conicus Xu, 1976, Heterocoryphodon fl erowi (Chow, 1957) and Eudinoceras mongoliensis Osborn (1924) were selected as the most common mammals in Asia to study their molar materials for histological sections to discuss the formation of multi-tip crowns Mode and estimate their crown formation time. The results showed that the formation time of the third molar crowns on A.conicus, H.fl erowi and E.mongoliensis were 2.99 ± 0.1, 3.63 ± 0.11 and 3.68 ± 0.22 yr, respectively. The life history of the three crown mammals was in line with Slow growth, long life model. Considering the effect of body size, H. fl erowi’s life history is more suitable for comparison with Hippopotamus amphibius than other large herbivores, and the life history of E.mongoliensis is more suitable for Ceratotherium simum Analogy, while A.conicus life history slightly shorter than the current hippopotamus. The intraspecific variation data of these existing species can provide reference for the taxonomic problems of the mammalian beetles.