A Miocene breeding ground of an extinct baleen whale (Cetacea: Mysticeti).
A Miocene breeding ground of an extinct baleen whale (Cetacea: Mysticeti).
复制标题
灭绝的Baleen Whale的中新世繁殖地（Cetacea：Mysticeti）。
作者：
Tsai CH
确定繁殖地点绝对是了解生态需求和维持种群/物种可持续性的关键。在这里，我重新研究了日本广岛Shobara的Itahashi组(16.1-15.6 Ma，中中新世)下部已灭绝的须鲸Parietobalaena yamaokai的已发表标本。在一个标本中，枕上和枕外之间的开放缝合是一个关键的、以前没有被注意到的特征，这表明保存了一个非常年轻的个体--不到6个月大，甚至接近新生的小牛。鉴于出现了一头新生的鲸鱼和相对丰富的Parietobalaena yamaokai组合，我建议在广岛Shobara(16.1-15.6 Ma)中中新世为灭绝的须鲸P.yamaokai提供一个以前隐藏和未知的繁殖地。灭绝种群/物种古繁殖地的发现应该有助于我们从长期的角度理解生物灭绝，因为保护古生物学旨在为保护濒危种群/物种的政策制定提供新的见解。
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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