Fossil Herpetocetine Baleen Whales (Cetacea, Mysticeti, Cetotheriidae) from the Lower Pliocene Horokaoshirarika Formation at Numata, Hokkaido, Northern Japan

Yoshihiro Tanaka; Hitoshi Furusawa; Lawrence G. Barnes

doi:10.2517/2017PR025

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Yoshihiro Tanaka,^1,2,3 Hitoshi Furusawa,⁴ Lawrence G. Barnes⁵

¹Osaka Museum of Natural History, Nagai Park 1-23, Higashi-Sumiyoshi-ku, Osaka 546-0034, Japan (e-mail: ) tanaka@mus-nh.city.osaka.jp
²Numata Fossil Museum, 2-7-49, Minami 1, Numata Town, Hokkaido 078-2225, Japan
³Hokkaido University Museum, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
⁴Sapporo Museum Activity Center, 5-15-1-6, Hiragishi, Toyohira-ku, Sapporo, Hokkaido 060-0001, Japan
⁵Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, U.S.A.

Abstract

Two mandibles of fossil mysticetes from the early Pliocene, upper part of the Horokaoshirarika Formation at Numata Town, Hokkaido, Japan, belong to the archaic, extinct cetotheriid baleen whale, Herpetocetinae gen. et sp. indet. by having an elongated angular process projecting posteriorly beyond the mandibular condyle. The new materials of the Herpetocetinae represent their northernmost occurrence in the North Pacific.

Citation Download Citation

Yoshihiro Tanaka, Hitoshi Furusawa, and Lawrence G. Barnes "Fossil Herpetocetine Baleen Whales (Cetacea, Mysticeti, Cetotheriidae) from the Lower Pliocene Horokaoshirarika Formation at Numata, Hokkaido, Northern Japan," Paleontological Research 22(4), 295-306, (1 October 2018). https://doi.org/10.2517/2017PR025

Received: 29 November 2015; Accepted: 25 November 2017; Published: 1 October 2018

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