A Miocene breeding ground of an extinct baleen whale (Cetacea: Mysticeti)
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, Mid...
| Published in: | PeerJ |
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| Main Author: | |
| Format: | Text |
| Language: | English |
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PeerJ Inc.
2017
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| Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5571789/ http://www.ncbi.nlm.nih.gov/pubmed/28848691 https://doi.org/10.7717/peerj.3711 |
| Summary: | 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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