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A new species of Middle Miocene baleen whale from the Nupinai Group, Hikatagawa Formation of Hokkaido, Japan

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Title: A new species of Middle Miocene baleen whale from the Nupinai Group, Hikatagawa Formation of Hokkaido, Japan
Authors: Tanaka, Yoshihiro Browse this author →ORCID
Ando, Tatsuro Browse this author
Sawamura, Hiroshi Browse this author
Keywords: Fossil
Baleen whale
New genus
New species
Mysticeti
Issue Date: 26-Jun-2018
Publisher: PeerJ
Journal Title: Peerj
Volume: 6
Start Page: e4934
Publisher DOI: 10.7717/peerj.4934
Abstract: A fossil whale from the Hikatagawa Formation (Middle Miocene, 15.2-11.5 Ma) of Hokkaido, Japan is described as a new genus and species Taikicetus inouei and its phylogenetic position is examined. Consistent with the result of Marx, Lambert & de Muizon (2017), the Cetotheriidae form a clade with the Balaenopteroidea, and "a clade comprising Isanacetus, Parietobalaena and related taxa" is located basal to the Balaenopteroidea + Cetotheriidae clade. Taikicetus inouei is placed in the clade with most of members of "Cetotheres" sensu lato comprising Isanacetus, Parietobalaena and related taxa. Taikicetus inouei can be distinguished from the other members of "Cetotheres" sensu lato in having an anteriorly swollen short zygomatic process, high triangular coronoid process, and angular process, which does not reach as far posterior as the mandibular condyle. Taikicetus inouei is only record of "Cetotheres" sensu lato from Hokkaido, Japan and the northern-most records of "Cetotheres" sensu lato in Japan.
Rights: http://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/71751
Appears in Collections:総合博物館 (The Hokkaido University Museum) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田中 嘉寛

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