https://scholars.lib.ntu.edu.tw/handle/123456789/640753
標題: | Coexistence of Oligocene toothed and baleen-assisted mysticetes in the northwestern Pacific | 作者: | CHENG-HSIU TSAI Kimura, Toshiyuki Hasegawa, Yoshikazu |
關鍵字: | Aetiocetidae | Chattian | Jinnobaru Formation | Mysticeti | toothed baleen whale | Umashima | 公開日期: | 11-一月-2024 | 出版社: | Pensoft Publishers | 卷: | 27 | 期: | 1 | 起(迄)頁: | 95-100 | 來源出版物: | Fossil Record | 摘要: | Oligocene mysticetes display an unparalleled diversity and morphological disparity in the evolutionary history of Mysticeti. However, their paleoecological aspects, such as the patterns of coexistence of different morphotypes, remain poorly explored. Here we describe an aetiocetid (toothed mysticete) from the Jinnobaru Formation (lower upper Oligocene, about 28 million years ago) of Umashima Island, Kitakyushu, Japan. Our description of a toothed mysticete from the Oligocene of Umashima exemplifies the coexistence of toothed and baleen-assisted mysticetes in the northwestern Pacific. Hopefully, new finds of Oligocene mysticetes will lead to a well-sampled dataset for analyzing this and other related paleoecological traits to understand the demise of “archaic” Oligocene mysticetes and the subsequent rise of the modern-looking baleen-bearing whales in Miocene times. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/640753 | ISSN: | 21930066 | DOI: | 10.3897/fr.27.e111567 |
顯示於: | 生命科學系 |
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