期刊
PEERJ
卷 5, 期 -, 页码 -出版社
PEERJ INC
DOI: 10.7717/peerj.3711
关键词
Cetacea; Mysticeti; Breeding stie; Population dynamics; Conservation paleobiology; Parietobalaena yamaokai
资金
- Japan Society for the Promotion of Science
- Grants-in-Aid for Scientific Research [15F15329] Funding Source: KAKEN
Locating breeding sites is definitely a key to understanding the ecological requirements and maintaining the sustainability of populations/ species. Here I re-examined published specimens of an extinct baleen whale, Parietobalaena yamaokai, from the lower part of Itahashi Formation (16.1-15.6 Ma, Middle Miocene) in Shobara, Hiroshima, Japan. A critical and previously unnoticed feature, the open suture between the supraoccipital and exoccipital, in one specimen indicates the preservation of a very young individual-under six months old and even close to a new-born calf. Given the occurrence of a new-born whale and relatively abundant assemblage of Parietobalaena yamaokai, I propose a previously hidden and unknown breeding ground for the extinct baleen whale, P. yamaokai, in the Middle Miocene of Shobara (16.1-15.6 Ma), Hiroshima. Discovery of paleo-breeding sites of extinct populations/species should further help us to understand biological extinctions from a long-term perspective as conservation paleobiology aims to offer new insights into policy making for conserving endangered populations/species.
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