A Miocene breeding ground of an extinct baleen whale (Cetacea: Mysticeti)
Journal
PeerJ
Journal Issue
5
Start Page
e3711
ISSN
2167-8359
Date Issued
2017-08-22
Author(s)
Abstract
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.
Subjects
Breeding stie
Cetacea
Conservation paleobiology
Mysticeti
Parietobalaena yamaokai
Population dynamics
SDGs
Publisher
PeerJ Inc.
Type
journal article