A new skull of an early diverging rorqual (Balaenopteridae, Mysticeti, Cetacea) from the late Miocene to early Pliocene of Yamagata, northeastern Japan

被引：1

作者：

Tanaka, Yoshihiro ^{[1
,2
,3
]}

Nagasawa, Kazuo ^{[4
]}

Taketani, Yojiro

机构：

[1] Osaka Museum Nat Hist, Higashi Sumiyoshi Ku, Nagai Pk 1-23, Osaka 5460034, Japan

[2] Hokkaido Univ Museum, Kita Ku, Kita 10,Nishi 8, Sapporo, Hokkaido 0600810, Japan

[3] Numata Fossil Museum, 2-7-49,Minami 1, Numata Town, Hokkaido 0782225, Japan

[4] Yamagata Prefectural Touohgakkan Jr & Senior High, 1-7-1 Chuo Minami, Higashine City, Yamagata 9993730, Japan

来源：

PALAEONTOLOGIA ELECTRONICA | 2020年 / 23卷 / 01期

关键词：

rorquals; Balaenopteridae; Noguchi Formation; Furukuchi Formation; Miobalaenoptera numataensis; ontogenetic variation; BALEEN WHALES CETACEA; MAMMALIA; CETOTHERIIDAE; MORPHOLOGY; NEOGENE; GROWTH; OSSIFICATION; CALIFORNIA; PATTERNS; HOKKAIDO;

D O I：

10.26879/1002

中图分类号：

Q91 [古生物学];

学科分类号：

0709 ; 070903 ;

摘要：

The family of rorquals and humpback whales, Balaenopteridae includes the largest living animal on Earth, the blue whale Balaenoptera musculus. Many new taxa have been named, but not many from the western Pacific, except Miobalaenoptera numataensis from Japan. Here we describe an early balaenopterid, cf. M. numataensis from a late Miocene to early Pliocene sediment in Yamagata Prefecture, northeastern Japan. The species has a straight and sharp lateral ridge of the fovea epitubaria at the ventral surface of the periotic, and a dorsoventrally thin pars cochlearis. The new specimen provides knowledge of supposed ontogenetic variation and periotic morphology in poorly known fossil balaenopterids.

引用

页码：1 / 27

页数：27

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[41] Effects of size on the skull shape of the bottlenose dolphin (Tursiops truncatus) [J].