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Paleontological and paleogeographical studies of the first Tertiary small mammal fauna from Japan.

日本第一个第三纪小型哺乳动物群的古生物学和古地理研究。

基本信息

批准号：
07640627
负责人：
TOMIDA Yukimitsu
金额：
$ 1.47万
依托单位：
National Science Museum
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640627/
关键词：
Miocene Gifu Prefecture Insectivora Rodentia Castoridae Eomyidae MN3 paleobiogeography 小型哺乳類化石新属 MN3ゾーン第三紀

项目摘要

The first Tertiary small mammal fauna in Japan (=Dota local fauna) from Dota, KaniCity, Gifu Prefecture was composed of 2 orders, 4 families, and 4 genera, when the present study started. Research and excavations by this study added one insectivore, two rodents, two carnivores, and one artiodactyl ; therefore, the Dota local fauna is now composed of 5 orders, 7 families, and 9 genera. They are, Plesiosorex sp. (Insectivora), cf. Amphilagus sp. (Lagomorpha), Youngofiber sinensis, Anchitheriomys n. sp., ? Pseudotheridomys sp. or Pentabuneomys sp., Eomyidae n. gen. et n. sp. (Rodentia), Ursoidea gen. et sp. indet., Musteroidea gen. et sp. indet. (Carnivora), and Traguridae gen. et sp. indet.(Artiodactyla).Although the new genus of Eomyidae is known only from Czech and Gifu Pref. and only by a single specimen from each locality, it is very important in order to study the paleobiogeographic relationship between Europe and Asia.Out of 6 genera of small mammals, 5 genera are common between Do … More ta and Europe, indicating that the faunal interchange between Europe and Asia was extensive. 3 genera are common between Dota and North America, indicating that the faunal interchange between North America and Asia was fairly successful. These facts suggest that faunal interchange among Europe, Asia, and NOrth America during the early to middle Miocene occurred more widely among wide variety of mammals.Dota local fauna is similar to "Merkur-Nord" fauna in Czech in the faunal composition. The age of the latter is MN3a of European land mammal age and is about 22 to 20 million years ago (MA). The Nakamura Formation that yielded the Dota local fauna does not yield proboscidean fossils, but the proboscideans have been commonly known from the overlying Hiramaki Formation. Proboscideans appear in MN4 (ca. 18 MA) in Europe. Thus, the Dota local fauna can be correlated with MN3 in Europe. Fission-track ages obtained from the Nakamura Fm. Suggest that the age of Dota local fauna is about 21 to 19 MA which is somewhat older than previously thought. Less

日本第三纪第一个小型哺乳动物区系（=Dota地方动物区系）产于岐阜县卡尼市Dota，由2目4科4属组成。本次研究的研究和发掘增加了一种食虫动物，两种啮齿动物，两种食肉动物和一种偶蹄动物;因此，Dota当地动物群现在由5目，7科，9属组成。Plesiosorex sp.（Insectivora），cf. Amphilagus sp.（Lagomorpha）、中华幼蛛（Youngofiber sinensis）、近兽鼠（Anchitheriomys n.）例如，? Pseudotheridomys sp.或Pentabuneomys sp.，海潜蝇科一般;（啮齿目）、熊总科（Ursoidea gen.et sp. indet.）鼠总科属和种。（Carnivora），和Traguridae gen. et sp. indet.（偶蹄目）。虽然Eomyidae的新属只在捷克和岐阜地区发现，而且每个地点只有一个标本，但它对于研究欧亚古生物地理关系是非常重要的。在6属小型哺乳动物中，有5属常见于亚洲和欧洲之间，其中有5属在亚洲和欧洲之间，而在亚洲和欧洲之间，有5属在亚洲和欧洲之间。Eomyidae的新属在亚洲和欧洲之间是很常见的。 ...更多信息 ta和欧洲之间的动物区系交流，表明欧洲和亚洲之间的广泛。3属在Dota和北美洲之间共有，表明北美洲和亚洲之间的区系交流是相当成功的。这些事实表明，早中新世至中中新世期间，欧洲、亚洲和北美洲之间的动物区系交换在多种哺乳动物中发生得更为广泛，Dota当地动物区系在组成上与捷克的“Merkur-Nord”动物区系相似。后者的年龄是欧洲陆地哺乳动物年龄的MN 3a，大约在2200万年到2000万年前（MA）。在发现Dota当地动物群的中村组中并没有发现长鼻兽化石，但在上覆的平卷组中却发现了长鼻兽化石。长鼻龙出现在MN 4（约。18在欧洲。因此，Dota当地的动物群可以与欧洲的MN 3相关联。中村组裂变径迹年龄测定建议Dota当地动物群的年龄约为21至19 MA，这比以前认为的要古老一些。少