大阪府富田林市の大阪層群より発見された長鼻類化石について

概要

論文の詳細を見る
In this article, the authors dealt with some proboscidean fossils occurred from the lower part of the Osaka Group (Early Pleistocene) at eastern part of the Habikino Hills in Tondabayashi City, Osaka Prefecture. Those fossils are composed of one broken molar, four complete and incomplete incisors (tusks of elephants) and other bone fragments. Those materials were found together in a restricted small spot in the area, and were confirmed to be yielded from the same bed, pebbly silt, which is probably about 30 m below the First Marine Clay bed (Ma 1) of the Osaka Group. The fossil molar was identified as a molar of Stegodon cf. akashiensis (TAKAI) from its characteristic features. On the other hand, it is not sure whether all of the present incisors belong exclusively to S. cf. akashiensis or not, but it may be possible to assume from consideration to form of incisors that there were another species. Therefore, it is necessory to examine the coexistence of S. cf. akashiensis with Mammuthus paramammonteus shigensis (MATSUMOTO et OSAKI) in this stratigraphic level. Among them, the latter species is known as a zone species designated for the stratigraphic level of the present fossil bed in the Osaka Group.
地学団体研究会の論文
1984-03-25