Evolutionary Study of the Tertiary Primates in South East Asia

东南亚第三纪灵长类动物的进化研究

• 批准号: 14405019
• 负责人: SHIGEHARA Nobuo
• 金额: $ 8.7万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14405019/
• 关键词: Myanmar; Pondaung; Formation; middle Eocene; primate fossils; Anthropoidea; vertebrate fossils; Fission-track age; 絶対年代; 化石動物相; 東南アジア; 第三紀; タイ; Myanmar; Pondaung; Formation; middle Eocene; primate fossils; Anthropoidea; vertebrate fossils; Fission-track age; 絶対年代; 化石動物相; 東南アジア; 第三紀; タイ

The paleontological excavations were carried at the latest middle Eocene Pondaung Formation (about 37-38 Ma), which is distributed along the west bank of the Chindwin River, Central Myanmar. The main purpose of these investigations is to find the primate fossils, especially of anthropoid primates. Moreover, we have made the geological works at the same area : we made the columnar sections and also found the volcanic ash (tuffaceous layers) at the research area. There have been four genera of primates discovered from the Pondaung Formation : Pondaungia, Amphipithecus, and Myanmarpithecus of the Amphipithecidae, and Bahinia of the Eosimiidae. In addition, we discovered a new species of Eosimias, cf.E.puakkaungensis. Now we are preparing a description paper of an isolated lower molar, which was collected at the Pondaung Formation at Bahin village in 2004 field work.In 2004 and 2005 field seasons, we carried out the preliminary geological research at the outcrops of the Pondaung Formation near Pauk, and found another tuffaceous beds, which contained some zircon minerals. Using the Fission-track method, we obtained about 38 Ma from this zircon minerals, which support the absolute ages obtained from the Pondaung Formation near Bahin village.We have also published several description papers on the mammalian fossils, which were collected from the Pondaung Formation, and also some papers on the paleoenvironment of the Pondaung mammalian fauna.

古生物学发掘是在最新的始新世庞达中部（约37-38 ma）中进行的，该地层分布在缅甸中部的金德温河西岸。这些研究的主要目的是找到灵长类化石，尤其是人为灵长类动物的化石。此外，我们在同一地区进行了地质作品：我们制作了柱状部分，并在研究区域找到了火山灰（Tuffaceous层）。从庞达的形成中发现了四个属的灵长类动物：庞达族，两亲硫西氏菌和缅甸的两栖动物和缅甸科，以及eosimiidae的巴希尼亚。此外，我们发现了一种新的Eosimias，请参见Puakkaungensis。现在，我们正在准备一份描述论文，说明了一条孤立的下摩尔尔，该论文是在2004年在巴欣村的庞达形成中收集的。2004年和2005年的田间季节，我们在Pauk附近的Pondaung组的露头进行了初步的地质研究，并找到了另一个Tuffaceous Beds，并找到了另一个Tuffaceous Beds，其中包含了一些氧化氧化氧化氧化氧化氧化氧化氧化氧化氧基。使用裂变轨道方法，我们从这个锆石矿物质中获得了约38 mA，该矿物支撑了从巴欣村附近的庞达形成获得的绝对年龄。我们还发表了几篇有关哺乳动物化石的描述论文，这些论文是从庞达的形成中收集的，还从庞德的形成中收集了一些论文，并在pondaungironcirient of phonvironcirient of pondaund of pondaun。